START-448 A Plain Glasses-Wearing Office Junior Turns Out to Be a Secretly Bold Tease: After We Hooked Up Once as a Joke, She Changed Completely and Used the Techniques She’d Learned from Erotic Manga to Make Me Finish Again and Again — Riko Hoshino

Hoshino is a plain office worker with glasses and long, untrimmed bangs. One day, during overtime, she becomes physically involved with a flirtatious coworker she had feelings for. Hoshino is extremely shy even about showing her bare body, but after their first time, she changes completely. Using techniques she had learned from the adult manga she often read, she takes the lead and overwhelms her coworker. Their relationship, with the roles of attacker and receiver reversed, continues to repeat in the office.