I Fell in Love with a Delivery Health Girl and Was Aggressively Seduced by Her on an Off-Duty Date, Coming Undone Over and Over Again in Broad Daylight. Natsuki Rin
One day, a salaryman who feels unwanted by his family and leads a monotonous life finds himself alone on his birthday, as his family goes on a trip without him, leaving no one to celebrate. Feeling lonely, he decides to try delivery health for the first time in his life. That's when he meets a charming girl named Rin. From the moment they meet, his heart begins to stir, and a pure, age-defying love slowly starts to bloom. Drawn deeper by her presence, he begins to question everything about his life up until now.