Kyou Kara Tsukaeru Isekai Ren'ai Manual

"I like you. Please go out with me—"Just as Haruchika Isezaki confesses to his first love, he is suddenly summoned to another world. His summoner, the goddess Clemontine, gives him an unusual mission: to make seven girls, destined to become the mothers of the next generation of heroes, fall in love again. These girls have lost their ability to love due to a curse cast by the Demon King. In other words, Haruchika must make them fall for him!To return to his world and hear the answer to his confession, Haruchika accepts this mission and sets out to save another world through love. Having mastered the art of romance through psychology and become a Love Master, his journey to fulfill his first love begins now—a romantic tale of saving another world through the power of love!