So_low ~Futago Shimai to Kateikyoushi~ episode 4

Mitsuki thought she’d found the perfect solution. If she had to endure Kouta’s outrageous demands while studying, she’d at least relocate to the quietest place possible: the library. Peace, silence, and maybe a chance to focus. But she underestimated Kouta. No matter where she goes, he follows, and he never lets her forget the “punishments” she owes him for every mistake.

Even in the library’s hushed stillness, with only the faint scratching of pens filling the air, he makes his move. Mitsuki unfastens a button on her uniform, quietly exposing herself, while Kouta’s hands shamelessly explore.

Later, searching for a reference book, she stretches toward a shelf too high for her. Kouta seizes the moment, and just as she’s caught up in the moment, a familiar face peeks around the other side of the shelf—her friend, staring directly at her. Their eyes lock.