This is a four-volume set of "Kimi to Eureka"! The cover of the first volume is as shown in the second image, but the contents themselves are clean. #Ayuko #Manga #COMIC #Girl A high school girl, Mai, who lives alone, suddenly has a boy named "Watari" come to her house. A genius boy returned from Northern Europe, but somehow mysterious and laid-back, Watari-kun and Mai start living together!? A cute and warm cohabitation life begins!