"...If you don't mind, could you teach me something naughty in secret?"

One day, Yamato, a university student living at home, decides to take on an international student named Smith as his host family.

Yamato, who was instantly attracted to Smith from the moment he saw him, accidentally sees him naked in the bathroom. Unable to resist, he starts masturbating, but then Smith finds out...!?

However, contrary to Yamato's impatience, Smith is very interested!

Apparently, Smith's country has strict sexual regulations and is unaware of this kind of pleasurable practice.

He begs him to teach him all sorts of things that are taboo in his home country!

Hugs that feel the body heat, kisses, touching, and more...

Just the two of them under one roof, they experience naughty culture for the first time!