At sports powerhouse Eimei High, **Taiki Inomata** of the boys' badminton team secretly loves **Chinatsu Kano**, the girls' basketball ace one year his senior whom he sees at every morning practice.
One day, Chinatsu comes to live at Taiki's home, beginning a youth story of **living with the senior he admires**.
Produced by Electric Circus; Season 2 premieres October 4, 2026 🏸
📝 魅力・見どころ・特徴 ネタバレ控えめ
01① Living With the Admired Senior × One-Sided Love
The greatest charm is the orthodox setup where protagonist Taiki **lives under one roof** with the senior he admires, Chinatsu.
The heart-pounding cohabitation with his one-sided crush colors a bittersweet youth.
Watch the delicate sway of feelings born from being so close 💕
02② A Youth Ensemble of Sports × Romance
This is a youth story set against **two sports** — badminton and basketball.
It depicts the effort of high schoolers devoted to their sports and their intersecting feelings.
The charm of a youth ensemble that balances earnest pursuit of dreams with the bittersweetness of love 🏸
03③ Delicate Emotional Depiction
The charm is the careful depiction of the characters' **delicate emotional movements**.
Unspoken feelings and the sway of crossed hearts are portrayed realistically.
You can't help but empathize with the life-sized high schoolers' feelings ✨
04④ Season 2 Heads Into a New Phase
Season 2 depicts Taiki and Chinatsu gradually growing closer.
Moreover, a **new character** who casts ominous words at Chinatsu appears, and the story enters a new phase.
Watch the new development that shakes the fate of the two's romance 🔥
05⑤ Electric Circus's Animation
Produced by Electric Circus, continuing from Season 1.
The animation of fresh youthful atmosphere and dynamic sports scenes is a charm.
Look forward to that beautiful visual expression in Season 2 too 🎬
06⑥ Acclaimed Cast Continues
Taiki Inomata is voiced by Shoya Chiba and Chinatsu Kano by Reina Ueda.
The cast also features Akari Kito, Yuma Uchida, Kana Ichinose, and Yuki Kaji.
Watch the sure performances expressing delicate emotions 🎤
07⑦ For Fans of Youth Romance
Irresistible for fans of youth romances like 'Horimiya' and 'The Quintessential Quintuplets.'
You can savor both earnest devotion to sports and bittersweet feelings at once.
An orthodox youth story packed with heart-flutters and empathy 💕
08⑧ 📺 Broadcast & Streaming Info
Premiere: October 4, 2026 (Sun)~
Channels: TBS network (28 stations, Sun 16:30~)
Studio: Electric Circus
Check the official site for the latest info 📱
💡 注目ポイント・展開予想 軽めネタバレ
Season 2 is expected to center on Taiki and Chinatsu gradually growing closer.
Meanwhile, a new character who casts ominous words at Chinatsu appears, with possible turmoil in their relationship.
How Taiki's one-sided love develops, and what becomes of childhood friend Hina's feelings — the swaying youth romance is the biggest point to watch.
🧾 これまでのあらすじ ネタバレあり
Taiki Inomata, who attends sports powerhouse Eimei High, secretly loved Chinatsu Kano, the girls' basketball ace he saw at every morning practice.
One day, Chinatsu came to live at Taiki's home due to her parents' overseas transfer, and the two suddenly became people who "live under one roof."
Season 1 depicted youth where living with the admired senior, each one's sport, and relationships with friends intersect. In Season 2, as the two grow closer, new developments arrive.
✅ 観る・注目するおすすめポイント
Wholeheartedly recommended for fans of youth romances like 'Horimiya' and 'The Quintessential Quintuplets.'
Especially resonates with those who want both earnest devotion to sports and bittersweet feelings.
An orthodox youth story packed with heart-flutters and empathy.
👀 トリビア・驚きの小ネタ集
・It gained popularity as a full-fledged youth romance, rare for Shonen Jump.
・The title "Blue Box" is said to pun on youth and the gymnasium ("box").
・Season 1 aired from 2024 to 2025.
💫 未回収の伏線 ネタバレあり
Points to watch in Season 2:
● Will Taiki and Chinatsu's relationship move beyond one-sided love?
● The identity and aim of the new character who casts ominous words at Chinatsu.
● How childhood friend Hina Chono's feelings for Taiki are depicted.
● Growth and setbacks in each sport (badminton, basketball).
● What ending the youth ensemble of intersecting feelings reaches.
● Fans' attention is on the fate of the bittersweet romance.
💌 次シーズンで絶対バズる名セリフ予想
● "I want to chase the same dream as my senior."
—Taiki's feelings, powered by admiration.
● "I want to properly convey the feelings I couldn't say."
—The true feelings of characters with swaying hearts.
The exchanges of high schoolers carrying unspoken feelings make viewers' hearts flutter.
Season 2 should keep coloring youth with bittersweet lines 🏸