Kashidashi Tsuma, Marina no "Netorase" Houkoku: Binkan Tsuma to Zetsurin Daigakusei

The main protagonist lives a happy everyday life with his loving family, one day he encounters a forum website; "lending" your wife to another man, with this a thought crosses his mind "what would it feel like if I lent my wife to other men?" and his desire is soon realized...

(Source: VNDB)