"We'll be friends forever!" — at the end of a childhood summer, protagonist **Hayato Kirishima** made a promise with a precious "male friend."
Seven years later, the childhood friend Hayato reunites with after transferring to a city high school has become a **refined, lovely beauty, Haruki Nikaido**. A youth romcom that sways between an old promise and a changed appearance.
Produced by project No.9, OP "Natsu ni Kasanete" by DIALOGUE+. Premieres July 6, 2026 🌻
📝 魅力・見どころ・特徴 ネタバレ控えめ
01① The Childhood Friend Thought to Be a Boy Became a Beauty
The greatest charm is the shocking gap where the best friend Hayato **thought was a "boy" and played with in childhood** has become a **refined, lovely beauty** at their seven-year reunion.
The friend he played with in the mud became, of all things, a beautiful girl — the flutter of this reunion moves the story.
A youth romcom that adds a strong gap to the orthodox childhood-friend theme 🌻
02② An Old Promise as the Story's Axis
"We'll be friends forever!" — the **promise** made in childhood is the story's axis.
Between a relationship unchanged despite changed appearances and newly blossoming feelings, the two sway.
Watch the emotional youth where things that changed and things that didn't intersect ✨
03③ The Flutter of an Innocent Distance
The charm is the **innocent distance** of the two reunited.
The friend he once played with as a boy is now someone of the opposite sex he can't help being conscious of — this change creates bittersweet flutters.
You can't help your heart fluttering at the life-sized high schoolers' feelings 💕
04④ The Charm of the Heroine Haruki
The heroine **Haruki Nikaido** is now a refined, lovely beauty.
But inside, she's still the best friend who played in the mud — the gap of appearance and personality is adorable.
Watch the cute yet approachable heroine voiced by Ikumi Hasegawa ✨
05⑤ project No.9's Animation
Produced by project No.9, renowned for romcom works.
The animation depicting cute characters and the innocent atmosphere of youth is a charm.
Look forward to careful visual expression that colors the bittersweet romance 🎬
06⑥ Themes by DIALOGUE+ & harmoe
The opening theme is "Natsu ni Kasanete" by DIALOGUE+.
The ending theme is "Tilt" by harmoe.
Watch for fresh, cute songs perfect for a summer youth 🎵
07⑦ For Fans of Childhood-Friend Romcoms
Irresistible for fans of childhood-friend works and youth romcoms with a gap.
You can savor the bittersweet love that sways between a changed appearance and an unchanged relationship.
An innocent youth romcom perfect for summer 🌻
08⑧ 📺 Broadcast & Streaming Info
Premiere: July 6, 2026 (Mon) from 23:30~
Channels: TOKYO MX, BS Fuji and others
Studio: project No.9
Check the official site for the latest info 📱
💡 注目ポイント・展開予想 軽めネタバレ
The story is expected to center on the reunited Hayato and Haruki gradually growing closer, carrying an old promise, within a changed relationship.
Between the ease of when they were boy friends and the flutter of being conscious of each other as opposite sexes, the two sway.
What love the childhood promise turns into — the fate of a bittersweet youth is the biggest point to watch.
🧾 これまでのあらすじ ネタバレあり
This is a new anime starting in summer 2026.
"We'll be friends forever!" — at the end of a childhood summer, protagonist Hayato Kirishima made a promise with a precious "male friend."
Seven years later, the childhood friend Hayato reunites with after transferring to a city high school has become a refined, lovely beauty, Haruki Nikaido. Swaying between an old promise and a changed appearance, a youth romcom beginning from their reunion opens.
✅ 観る・注目するおすすめポイント
Wholeheartedly recommended for fans of childhood-friend works and youth romcoms with a gap.
Especially resonates with those who want the bittersweet love that sways between a changed appearance and an unchanged relationship.
An innocent youth romcom perfect for summer.
👀 トリビア・驚きの小ネタ集
・Its abbreviation is "Tenbin."
・A recent-light-novel-style work whose long title conveys the content at a glance.
・The OP is by DIALOGUE+ and the ED by harmoe, voice-actor units.
💫 未回収の伏線 ネタバレあり
Points to watch in the work:
● Why was Haruki, thought to be a boy friend, considered a "boy"?
● What love does the childhood promise of "friends forever" turn into?
● The change in Hayato's feelings toward Haruki, now a beauty.
● Will new rivals appear in the two's relationship?
● How do the two face what changed and what didn't?
● Watch the fate of a bittersweet childhood-friend romcom.
💌 次シーズンで絶対バズる名セリフ予想
● "We'll be friends forever!"
—The childhood promise that is the story's axis.
● "You… were a girl all along…?!"
—Hayato's true feelings, shocked at the reunion.
The exchanges of two swaying between a changed appearance and an unchanged relationship make viewers' hearts flutter.
Once it airs, bittersweet lines should color youth 🌻