18+ Tamashii Insert: Fushigi App de Ano Ko ni Hyoui

Half a year after Naoto Takahashi's father got remarried, he still hasn't gotten used to the new family members: his stepmother, Sachiko, and his new little sister, Yui. One night as he tries to figure out how to smooth things over with his sister, he gets an app which allows him to take over someone else's body.

Included one-shots:
Kyou wa Kawari ni "Naka no Hito"
Sono Shiroki Utsuwa ni Odei ni Sosogu