Wataru Sakurai, an Alien with Breasts However, Wataru was living a miserable school life where he could not enjoy the life of big breasts, but things changed completely when his father moved away from home. The beautiful sisters who moved in next door are Fumie Fusano and Tomoka, who once took care of Wataru in place of his mother. Fumie, who has huge breasts measuring 100 cm, and Yuka, who has beautiful big breasts. What's more, Fumie is Wataru's school teacher and Yuka is her tutor, allowing them to have access to big breasts day and night.