Blue Box
Blue Box is a gentle high school anime about a boy who plays badminton and develops a crush on a girl on the basketball team, following their sports journeys and budding feelings across 25 episodes. The series is warm and low-key, with content well within TV-PG territory and nothing frightening or intense.
Best for tweens and teens who enjoy sports stories and sweet, slow-burn romance; younger children are unlikely to find the high school themes relatable.
Episodes to know about
Taiki's romantic feelings for Chinatsu drive the whole series; expect longing looks, flustered moments, and gentle jealousy throughout every episode.
A comedic basketball-to-the-face accident and a slapstick kick to the rear occur early in the series; both are played purely for laughs with no harm shown.
Rival players are overheard speaking poorly about Chinatsu's game performance, which upsets her; the show frames it as something she must push through.