Mama ni Ongaeshi, Giving Back to Mom
His mother got pregnant at a young age and decided to give birth to him. She devoted her life and youth as a single mother to raise her son. Feeling guilty over her inability to give her only family a normal lifestyle, she even offered her own body to her sexually awakened son; Nevertheless, he grew up to be a fine young man (with a raging mother complex, however). Wanting to ease the burden on his mother sooner, he puts his heart into looking for a job; and once their lifestyle stabilizes, he plans to "give back to her" in order to grant her that desire that she's always had. (Source: [DMM](https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_072418/))