DroppedActionFantasyShounenIsekai

Humanity's Existence Depends on Love Gambling with Another World's Princess

Kawamoto Homura, ZuzuAlso known as: Isekai no Hime to no Koi Bakuchi ni, Jinrui no Sonbо̄ ga Kakkatemasu · 異世界の姫との恋バクチに、人類の存亡がかかってます

The Great Demon Lord's daughter, Lumis, joins an all-girls boarding school to experience romantic love, and joins the class of the only male teacher, Kazuki. One day, Kazuki overhears that the Great Demon Lord will destroy the earth if he makes his daughter cry...!? The ultimate heart-throbbing rom-com commences!