Ai no Senbiki: Mamakatsu Shitara Mama ga Dekita Hanashi

The protagonist ​​is a middle school boy named Jun Hikawa, who lost his mother at birth. He glares at his classmates who complain about their own overprotective mothers and wonders what it would be like if he had a mother of his own. The story begins when Jun, who wants the warmth of a mother, lies about his age and matches up with a stranger on a sugar mama dating app.

(Source: Natalie, translated)