I read this manga a long time agao and now I dont remember its name nor where I read it.
In the chapter I read, the boy catches a cold and his girlfriend cures him by letting him see her in her bikini.
I know it's a vague information bu it's all I can remember. Hope some one can tell me its name. Thanks!

This should be it

Ta-dah!

This signature was recovered from Hades to serve in my rotting armies.

Nazo no Kanojo X maybe? Something along the lines happens in there.

This week's favorites:

• Golden Kamui

ççççççç[Ô.Ô] tsutopodus© will eat your manga and steal your cats!

which is exactly what xombie just linked 😛

Yes, it's Nazo no Konojo X.
You guys are amazing. It takes only 2 minutes. Thanks a lot.