The virgin protagonist "Rikuto" lives in a house in a quiet residential area. He enjoys an elegant life alone with money sent from his parents who work abroad. Recently, he has been attracted to two beautiful sisters with big tits who work at a café right next to his house. Wanting to get to know them, Rikuto begins to frequent the café. As he becomes a regular customer and starts talking to them often, he learns that the sisters also want to be friends with Rikuto, and as he hopes, they become closer and closer. However, the sisters had a secret that they could not hide from each other. That's right, the two sisters are not human but "succubi"! According to their laws, once their true identities are discovered, the person who learns it must be killed. Rikuto desperately tries to make a deal with the sisters, whose red eyes and kiba shine brightly. "I will provide you with semen, the source of life for the whore, every day, but only if you spare my life!" So, the virgin hero, Rikuto, is forced to provide his semen to these sexually active demons until they are satisfied every day. This would cause trouble but his love of breasts and sexual appetite is incomparable to other humans! The latest in Electlip's Bakunyuu series... "Bakunyuu Succubus Sisters~ The Sisters next door are Succubus! A demonically heartwarming story filled with darkness, hardcore action and gigantic tits! Just how will it end?