Kyou Kara Tsukaeru Isekai Renai Manual

A man named Haruchika Isezaki is summoned to another world while confessing to his first love. A goddess named Clementine assigns him a task: to help seven women, who have lost their ability to love due to a curse, regain their capacity for love. These women are destined to be the mothers of future heroes. In order to return home and learn the outcome of his confession, Haruchika agrees to the mission. He uses his knowledge of female psychology to pursue relationships with them, aiming to restore their ability to love. His journey involves guiding them through their first experiences of love, with the goal of saving the world through romantic connections.