Humanity's Existence Depends on Love Gambling with Another World's Princess,Humanity’s Existence Depends on Love Gambling with Another World’s Princess,Isekai no Hime Bakuchi ni, Jinrui no Sonbou ga Kakattemasu,Isekai no Hime to no Koi Bakuchi ni, Jinrui no Sonbou ga Kakattemasu,The Survival of the Human Race Is at Stake in a Love Gamble Against the Princess From Another World,異世界の姫との恋バクチに、人類の存亡がかかってます