When Kaito Sickino attended the funeral of a relative, he ended up taking in four orphaned sisters. And that was when he recalled his previous life and realized that he was in a game world. He also realized that if he followed the plot, the four sisters, Chiharu, Chinatsu, Chiaki, and Chifuyu, who have had an unfortunate life up until now, will have to face an even more unfortunate future. Kaito decided that he must help the four sisters to be happy! The happy days spent with Kaito helped to ease the wounds and worries of each girl. Kaito's warm and sincere words open the hearts of the four sisters, all living under one roof, each with their own unique personality! (Source: Overlap, translated)

A certain high school boy who admired protagonists from manga and games died while saving a child. At that moment, God appeared and said he would reincarnate him as the protagonist in a visual novel game world. The boy trembled with joy, but that was God's big lie. His reincarnation destination was actually as a pathetically weak stepping-stone character! However, his extraordinary, abnormal efforts based on his delusion of being the protagonist began to drastically rewrite the status of this weak character! This changed the original course of the story, saved beautiful girls, and eventually even saved the world...? The heroic tale of a misunderstanding man who saves the world through sheer conviction!