Aru Hi Totsuzen, Gal No Iinazuke Ga DekitaONE DAY, OUT OF THE BLUE, I GOT A GAL'S FORGIVING WIFE; Aru Hi, Totsuzen Gal no Iinazuke ga Dekita; ある日、突然ギャルの許嫁ができた; Aru Hi, Totsuzen Gyaru no Iinazuke ga Dekita; One Day, I Suddenly Got Myself a Gal Fiancée​; One Day, Out of the Blue, I Got a Gal's Forgiving Wife

``Hey, hey, why are you always pretending to be asleep?'' Miran Katsuki, a positive gal who reigns in the upper class of the school caste, often asks Shuji Nagasawa, aka me, an otaku. I was confused by her suggestive behavior, but she unexpectedly announced that he was his fiance!? A school romantic comedy between two polar opposites, Yin and Yang, has begun!