Skip to content
Zenless Zone Zero Wiki

“On air, on time — New Eridu never sleeps.”

Explore →

Back to That Summer

Last updated 2026-04-02

Back to That Summer is a Trust Commission for Vivian Banshee at Lumina Square.

Steps

  1. Find out what Vivian is doing
  2. Have noodles with Vivian
  3. Talk to Vivian beside the river

Gameplay Notes

  • During steps 2-3, the player will enter Quality Time with Vivian.
    • If the mode is exited, it can be resumed by interacting with Vivian at the playground during step 2 or interacting with the marker next to Waterfall Soup during step 3.

Dialogue

Icon Dialogue Agent Find out what Vivian is doing

Looks like Vivian is looking for something at the Lumina Square recreation area. Go say hi!
(Idle)
Vivian: I remember burying it here...
(Talk to Vivian)
With a small iron shovel, Vivian rummages through the sand for a while before finding a rust-stained metal box.
Vivian: Lord Phaethon, I was planning to visit you later~
Icon Dialogue Talk What are you doing?
Icon Dialogue Talk What's that?
Vivian: I buried something here a few years ago. I came to retrieve it.
Vivian: Years ago, when I had just left the Exaltists, I didn't have a lot of money.
Vivian: So I had to work part-time jobs every day and survive on cheap food.
Vivian: One of the girls I worked with was very kind and gave me a free meal voucher.
Vivian: But she quit not long after, and I never had the heart to use the meal voucher, so I hid it away.
Vivian: I thought that maybe by the time I took it out again, my life would no longer be so uncertain and difficult.
Vivian: I'd almost forgotten about it, but talking to you reminded me of the past.
Vivian: So I came to see if what I'd buried was still here or not.
Vivian: I'm surprised it's still here after so many years. Lucky!
Vivian: Lord Phaethon, would you like to go with me to the noodle shop where this voucher is valid?
You agree to Vivian's invitation and go to the noodle shop with her.
Icon Dialogue Agent Tracked Have noodles with Vivian

Vivian is asking if the meal voucher is valid. Go check it out!
(Ongoing)
Vivian: So much has changed over the years...
Vivian: I can still recall that night — I was sitting near here.
Vivian: It was dark around me, and I could barely make out anything in the distance.
Vivian: It felt just like my future, unclear and uncertain.
Vivian: I was quite pessimistic back then, thinking my life would never improve.
Vivian: I never thought I'd have all the friends I have now.
Vivian: Let alone all the skills I've acquired along the way.
Vivian: There are still things that make me sad when I think back on them...
Vivian: But when I really think about it...
Vivian: I've had more good things happen to me than bad~
Vivian: Like—
Vivian: Joining Mockingbird.
Vivian: I've managed to do some things that actually matter.
Vivian: Or like—
Vivian: Being able to sit here and enjoy noodles with you.
Vivian: Casually talking about my past...
(Interact with the marker in front of the noodle shop)
Vivian confirms with Chop Junior that the voucher is still valid.
Vivian: I can't believe it's still valid. Lucky!
Vivian: Come to think of it, I worked at a noodle shop for a while, too...
Vivian: The customers who left the deepest impression on me were the bear Thirens.
Vivian: They always ordered the extra large bowls.
Vivian: The first time I carried one of those bowls, I wasn't strong enough and ended up spilling some right in front of a group of customers.
Vivian: Thinking back, that was really rude of me...
Vivian: Even though the customers were big, they were some of the kindest people I met.
Vivian: The ones I spilled noodles on never got upset, they even offered to switch to smaller bowls.
Vivian: For a while after that, the bear Thiren customers would only order the regular-sized bowls whenever they came in.
Vivian: They'd finish one bowl, then order another...
Vivian: I didn't want them to keep accommodating me, so I started training to get stronger.
Vivian: Until I was able to carry two extra large bowls with one hand!
Icon Dialogue Talk Are you really that strong?
Icon Dialogue Talk !!!
Vivian: Hmph~ Don't underestimate me.
The noodles are served while you talk to Vivian. You share stories about past jobs while you eat.
While paying with the voucher, Vivian unexpectedly finds a letter inside the iron box...
Vivian: Huh? What's this letter? I have no memory of it at all.
Icon Dialogue Talk Open it and see?
Vivian: This is my handwriting...
Vivian: Oh... I remember now!
Vivian: This is a letter I wrote to my future self back then... Lord Phaethon, would you read it with me?
Vivian unfolds the letter and, walking along the path of Lumina Square, begins reading aloud the letter from the past.
Icon Dialogue Agent Tracked Talk to Vivian beside the river

Vivian is gazing out at the river. Go chat with her.
(Ongoing)
Vivian: To my future self:
Vivian: It's a warm day as I write this letter.
Vivian: The nice lady who gave me the free meal voucher quit her job today. She said she's going to follow her dreams.
Vivian: Her smile was fully [sic] of joy, and that made me happy too.
Vivian: But after she left, I felt a little down, because I realized I didn't have any dreams of my own...
Vivian: If I had to have a dream, I'd wish—
Vivian: I'd wish that by the time I read this again, I'm no longer hungry all the time.
Vivian: And that I get to wear pretty clothes.
Vivian: I hope that when my future self reads this, she can laugh at how silly I was.
Vivian: Because that would mean my simple, humble dream had come true.
Vivian: I'm sure that my future self must have even bigger dreams.
Vivian: I wonder if, when I read this again, I'll still remember these days clearly.
Vivian: I hope you remember the person I once was.
Vivian: But don't think about me too much.
Vivian: I wish for the future me to have grown into a better person.
(Interact with the marker at the riverside)
Vivian: Lord Phaethon, I appear to have embarrassed myself in front of you...
Icon Dialogue Talk I've caught a glimpse of your past self.
Icon Dialogue Talk This is one part of who you are.
Vivian: It's such a strange feeling, even though I wrote this myself.
Vivian: After reading the letter, it's like I've reunited with my former self.
Vivian: I remember it was a rainy summer, and the air was humid.
Vivian: The shop I worked at closed earlier than usual that day, so I saw off the nice lady.
Vivian: I used the pen from the cash register and sat by the window to write this letter.
Vivian: It's strange, this memory has suddenly become crystal clear.
Vivian: I wish I could tell her that all her dreams have come true.
Vivian: ...Even more than she could have ever imagined.
Vivian: And that she'll be proud of herself in the future.
Vivian: She'll grow into a great person.
Vivian: Does that sound foolish of me?
Icon Dialogue Talk Not at all.
Icon Dialogue Talk I have the same feeling.
Vivian: Have you ever written a letter to your future self, Lord Phaethon?
Icon Dialogue Talk Yes.
Vivian: I knew we'd have a lot in common.
Icon Dialogue Talk No.
Vivian: That's a pity... I thought I might get to see a letter written by your past self.
Vivian: Shall we write another letter together, Lord Phaethon?
Icon Dialogue Talk Hm?
Vivian: Let's write a letter to our future selves.
Vivian: Many years from now, when our memories fade, we'll forget a lot of things.
Vivian: But when we see the letter again, we'll remember everything we said and did today.
Vivian: I hope no matter how much time passes, I'll be able to hold onto the memories we shared.
You agree to Vivian's suggestion and write a letter to your future self with her.
When you read this letter again in the future, I hope you still hold the same wishes for yourself, just like Vivian once did.
To my future self, are you still working hard to become a better person?
Trust Rank Close Trust Rank Upgrade to Close with Vivian Banshee

Other Languages

LanguageOfficial Name
EnglishBack to That Summer
Chinese
(Simplified)
回到那年夏天
Chinese
(Traditional)
回到那年夏天
Japaneseあの夏に戻って
Korean그해 여름으로
Geuhae Yeoreumeuro
SpanishRegreso a aquel verano
FrenchRetour à cet été
RussianНазад в то лето
Nazad v to leto
Thaiกลับไปยังฤดูร้อนในปีนั้น
VietnameseTrở Về Mùa Hè Năm Đó
GermanZurück in jenen Sommer
IndonesianKembali ke Musim Panas Tersebut
PortugueseVoltando ao Verão

Change History