Seikatsu Shuukan The Animation

Main Title: Seikatsu Shuukan The Animatio
Official Title: 性活週間 THE ANIMATION
Synonym: 성활주간
Type: OVA, 2 episodes
Year: 29.03.2019 until 26.07.2019
Season: Spring 2019
Original Work: Michiking
Direction: Ohara Kazuhiro
Character Design: Ohara Kazuhiro
Animation Work: Seven

Shuntarou’s younger sisters – Ayaka, Chiaki and Fuyuno – are very mean to him, so he wishes he had a gentle older sister. Then some mysterious game seems to make him younger.