Hare Nochi Tokidoki Munasawagi

The main plot in the Hare games focuses on the love triangle between the player (the ultimate pervert), a "violent" girl, and a witch girl, both being classmates of the player.In this particular game, the whole gang goes out for a vacation, and many strange things happen around them. The player, due to his "perverted" nature, is the biggest suspect among the gang. To regain his dignity, the player has to find out the mastermind behind these events.

[From Anime Densetsu]