GIGANT is an ongoing manga series by Hiroya Oku, creator of Gantz.
Synopsis[]
Rei Yokoyamada, a high school boy whose father works for Toujou film production, is inspired to create his own short film with his friends. One day, while out to scavenge actors for his film, he spots a poster of Papiko, an adult video actress with big breasts, stating she lives in the area.