Hentai that had a girl character with similar hair as pic
She had grey hair with pigtails, loli-like
MC was some 'hard-dude' who just got out of prison or something along those lines
He has brown hair and spikey eyebrows, always looks angry and real buff
Think he marries the grey-haired loli in an episode or something
Forget what the name of the hentai is called
Thanks
By the sound of it, it's probably Daiakuji