Fuji Mutsuo, a university student, was an all-around athlete, intelligent, and good-looking man, and was living a smooth life.

...But Fuji has one big complex... It was because his penis was small!!

One day during a training camp, the complex that he had been hiding so that no one would find out was discovered by Souma Hayato, a junior in the same basketball club who is loved and called a loyal dog by those around him...

"Senpai, you have a complex about your small penis, don't you?"

Souma then offers to help him make his penis bigger...!?

A sweet and youthful love comedy about a doting doggy-like junior and a senior who has a complex about his small penis!