Tennomifune Academy boasts exceptional academic standards, only admitting the top-tier of students, except for those in Class 1-7. This particular cohort, ironically titled the "Happiness Class," comprises individuals who are battling personal misfortunes. The curriculum's primary objective is to aid them in their journey towards genuine happiness. An Hanakoizumi, Ruri Hibarigaoka, and Botan Kumegawa, all accepted into the academy, were subsequently assigned to the Happiness Class, beset with pernicious luck, amorous woes, and grave health issues, respectively. Together with their fellow students, they strive to overcome these challenges and live a fulfilling, joyous life.