Rin × Sen + Ran → Sem: Cross Mix

Riko, Asuka, and Urara are three high school girls who find themselves tangled in the kind of messy interpersonal web that tends to form when friendship, rivalry, and complicated feelings all occupy the same space. Rin x Sen + Ran → Sem: Cross Mix is a 2-episode OVA from Suzuki Mirano that pulls characters from two separate hentai series, RIN×SEN and RAN→SEM, and drops them into a shared story together. If you've already spent time with either of those titles, this crossover is essentially fan service in the narrative sense — familiar faces in new configurations, with some fresh dynamics to explore between them. The setup leans into their school-life interactions, letting the character relationships breathe a little before things escalate. The animation holds up well, putting genuine effort into expressions and scene composition. If you liked Resort Boin for its character-focused pacing between the explicit moments, or if RIN×SEN and RAN→SEM already have a place in your rotation, this crossover scratches a specific itch — seeing worlds collide and watching how characters from separate stories bounce off each other. It's a short watch at two episodes, adapted from visual novel source material, so there's a bit more narrative groundwork than you might expect from something this brief. Worth a look if you have existing attachment to either source series.