Kyou Kara Tsukaeru Isekai Renai Manual

Haruchika Isezaki is unexpectedly summoned to another world just as he confesses his feelings to his first love. The goddess Clemontine gives him a task: restore the ability to love in seven girls destined to become the mothers of heroes, after the Demon King’s curse has stripped them of their feelings. To return home and hear the answer to his confession, Haruchika agrees to make the girls fall in love with him. Drawing on his understanding of romance and psychology, he begins a quest to save another realm through love.