Eroge no Utsu End kara Heroine-tachi o Kyuusai Shitara

The protagonist is reborn as Ibuse Reio, the NTR villain from an eroge called "My Harem Heroines Got Stolen Right Under My Nose..." which is infamous for its heroines' tragic endings. "I won't let them be unhappy. I'll save them!" Using his knowledge of the game and the unique power of violence that comes with being a villain, he sets out to destroy every last bad ending! But just as he thinks his job is done after saving them all... "「「「We want to... stay with you forever.」」」" The tomboyish underclassman becomes as devoted to him as a puppy, and the serious student council president pampers him with lap pillows for him and him alone. He goes on dates with a hidden beauty otaku where they can fully indulge their shared hobbies. Doted on by all of them, they finally end up staying the night together!? It's a reward harem that begins with rescuing them from their tragic fates!