Koikimo

A cocky prodigy’s relentless, cringe‑filled courtship collides with a girl who refuses to be his trophy.

Ryou Amakusa is the archetype of a privileged prodigy who treats romance like a game—until a sudden rainstorm throws him into Ichika Arima’s arms. She rescues him from a near‑fatal tumble, and the brief contact sparks an odd fascination in Ryou. Later that night, he discovers Ichika is the best friend of his younger sister Rio, giving him the perfect excuse to pursue her under the guise of gratitude. Instead of a polite thank‑you, Ryou launches his usual barrage of smooth‑talk and over‑the‑top gestures, only to be met with Ichika’s unmistakable revulsion. Far from being deterred, he becomes oddly obsessed, interpreting every cold shoulder as a challenge. He escalates his antics—grand gestures, relentless texting, and cringe‑worthy confessions—each more invasive than the last. Ichika, a pragmatic high‑schooler with a strong sense of boundaries, finds his advances unsettling, yet she can’t help noticing the sincerity hidden beneath his flamboyant façade. The series follows their uneasy cat‑and‑mouse dance, balancing Ryou’s relentless, sometimes creepy devotion against Ichika’s growing curiosity about the man behind the playboy mask, all set against the backdrop of typical school life and youthful self‑discovery.

A romantic comedy where a 27-year-old salaryman aggressively courts his sister's 17-year-old best friend, ignoring her boundaries and treating her discomfort as a game. The series plays stalker-like persistence and a significant adult-minor power imbalance for laughs, which may normalize unhealthy relationship dynamics for younger viewers.