Kamataro

Yone-kun, a young man who doesn't hate sloppy things, and a naughty creature who is fluid with a free viscosity and shape. This is an adult version of "Yonekun to Jingai"

One day, Yone-kun, a typical young man, encountered an odd creature. It appeared jelly-like, watery, slimy, mushy, and enigmatic. Was it an extraterrestrial invader, or a mischievous being attacking people to do naughty things with them? A heartwarming tale unfolds as they begin living together, unaware of its true nature. (Transalate by Halo-RedFrog)