Riajuu Bakuhatsu Shiro! ~Henshin Nouryoku Te ni Ireta Dakedo Shitsumon Aru?~ by Swaneye - Adult Sex Game

The main character drags out the miserable life of a lonely guy. Observing the happiness of other people,
especially couples in love, he begins to feel anger and envy.
One day, the hero meets a girl named Sekiya Nanami, who has similar feelings.
They decide to unite with the goal of "destroying the happiness of other people."
As a bonus to their alliance, an unusual power was added that the hero received without knowing how - the ability to transform into other people. Taking advantage of this,
he will direct all his efforts to achieve the goal. Can a lonely virgin destroy someone else's happiness?
Add. information:
The distribution includes [Shimapan Patch] adding striped panties to H-scenes.
[switching in the settings menu, the first line ON / OFF]