What it is
Ao no Hako (*Blue Box*) is a 25-episode anime adaptation of Kouji Miura's Weekly Shōnen Jump manga, produced by Telecom Animation Film. First-year Taiki Inomata uses the school gym to train for badminton while keeping a quiet eye on Chinatsu Kano, the second-year basketball star. When Chinatsu's family relocates overseas, she stays in Japan — and moves in with Taiki's family. The two start chasing national-level competition in their respective sports while the proximity quietly does its work.
Why it's worth watching
It's a love-triangle sports anime that resists every cliché those words usually carry. Telecom slows down where most adaptations would speed up — long static shots in the gym, full conversations that play out in real silences. Komatsu Nana's Hane no Memory opening became one of the season's most-shared cuts. If you bounced off shōnen romance because of the genre's pacing problems, this is the show that proved the form can breathe.
When and where
The series aired weekly October 3, 2024 – March 27, 2025 on TBS in Japan, with simulcast on Netflix internationally. Twenty-five episodes; one continuous broadcast block. No second season is announced as of mid-2026, but the manga has plenty of runway.
What to watch for
The basketball matches in the back half of the season are the technical showcase — fluid, low-frame-rate cuts that emphasize footwork and tempo over the usual shōnen impact frames. If you're picking it up cold, episodes 1, 7, and 19 are the structural pillars.