Amachin calls himself a penis 4

The "I'm gonna get a boner!" evolves in Volume 4! The activities of the boy girl idol have begun, and the world's cutest boy(?) Amachin" enters a new frontier!

The "I'm gonna get a boner!" evolves in Volume 4! The activities of the boy girl idol have begun, and the world's cutest boy(?) Amachin" enters a new frontier!