This is a romantic comedy starring an adult 30 year old woman named Ayako who is confessed to by a man 10 years her junior, 20 year old college student Takumi... A man she knows as the boy "Takkun" who lives next door and who has tutored her adopted daughter since he was 10. The revelation astounds her as she thought her daughter Miu and he were an item.

17 year old Nonoyama Reiji goes to work at a public bath only to find it staffed with beautiful girls, who quickly take a liking to him.

Description from Triple Seven Scans.
Since his childhood Tamaki has had a medical condition; he gets the hives every time he has skin contact with a girl. One day his sister sends him a life-sized doll so he can use it to masturbate, to his surprise it's alive...and it looks exactly like his favorite eroge heroine, Lemon-chan!

The main character finds his possessions "abused" by some unknown person until he finally caught the culprit... masturbating to them?

Sanada Akihito, a student from Yotsuho Academy has been haunted by the angry spirit of a dead girl. In the exorcism that a friend was trying to do, the spirit manages to possess a girl from Akihito’s class and now that she has a body, she has worldly desires to satisfy in order to move, and Akihito just looks like her previous boyfriend!
-- Animexis