I remember ML worked at the you know he is payed to act as bf or brother or friend So Ml was hired to act as a big brother to a high school kid , he thought it'll be fine but the kid looks total hunk but is actually good i think the name was cool guy wants to be pampered idk So while acting as brother he finds MC very cute. MC was oldest so he wanted someone to take care of him that's why he hired ML to be his big brother , they fall for eachother and get into a relationship . And ML is'nt that old he was College student So it was very cute , Japanese short 5-6 chap story If anyone know pls tell , been searching for this and some other for a long time