The series focuses on high school student Rentarō Aijō, who in his lifetime fell in love and confessed to exactly 100 girls, only to be rejected by all of them.

While praying in a shrine, Rentarō is approached by the God of Love, who reveals that he, due to an error, is destined to have 100 soulmates.

Not wanting this to happen, and genuinely being in love with all of the girls, Rentarō is determined not to let any of his soulmates die as he meets and dates them all at the same time.

Due to an error on the God of Love's part, Rentarō is destined to have 100 which is to begin when he enters high school.

Sure enough, on the first day of high school, Rentarō meets the wealthy Hakari Hanazono and tsundere Karane Inda.

Not wanting such a fate to befall Hakari and Karane, Rentarō decides to date both of them simultaneously, with their blessing.

[6] On July 2, 2021, Seven Seas Entertainment announced they licensed the series for English publication in North America in print and on digital platforms in single volume editions.

'Thanks for Being So Lovable'), performed by Rentarō Family, a unit formed by the cast members of the heroines from the series' two seasons.

", performed by Amane Shindō, Suzuko Mimori, Rie Takahashi, Lynn, and Kanon Takao.