Domestic Girlfriend

Natsuo Fujii's unrequited feelings for Hina, his school's teacher, lead him to a high school mixer where he meets Rui, a girl who shares his awkwardness. The two bond over their lack of enthusiasm and Rui asks Natsuo to have sex with her, hoping it will change her friends' perceptions of her. However, their experience is unfulfilling, and they part ways. Unbeknownst to Natsuo, his father is remarrying, and his new stepmother, Tsukiko, is Hina and Rui's mother, creating a complex family dynamic with his step-sisters.