H♥Ero: Sei no Kyoushitsu

High school student Hiroki finds his daily life turned upside down when his younger sister, a cheeky and overly affectionate girl, makes her feelings for him unmistakably clear. Her bold advances and relentless teasing leave him struggling to maintain his composure, especially as their interactions grow increasingly intimate. What was once a typical sibling relationship quickly becomes a confusing and passionate game of push and pull.

As Hiroki tries to navigate this new dynamic, he realizes that his sister's love is not just a passing whim. Her persistent efforts to win him over force him to confront his own buried emotions, and the boundaries they once knew begin to blur. With each encounter, the tension between them escalates, pulling them deeper into a relationship that defies convention and tests their mutual restraint.