Domesticated Sexual Love (2014)

Blurb:
Can we be a family? Living together but not in a relationship . . . The beginning of something more than pleasure . . .

Riki born into poverty with no mother, forced into prostitution by his father and gets addicted to the pleasures of sex. All the while, Riki does it to protect his twin brother Kou from being tainted. But Riki can’t seem to stop having sex without love. Riki has only ever loved one man, Keiichi, his parole officer. Keiichi gets a divorce to adopt Riki in order to protect him but . . . will Riki’s feelings of pure unadulterated love ever become mutual?

Source: www.anisearch.com/manga/33775