Please help me find this manga

Hello! I'm trying to find this Manga that I've been searching of, I read it long ago but I can't seem to find it.

The bottom is older and the top is younger, they met when the top was just a baby and I think the top was around 5 years old! And he found the bottom really cute and kept Alot of baby pictures of him when they were older. And the Top didnt mind it. He found it creepy but at most he was kind of used to the weirdness of the bottom. The bottom pretty obsessed with the top and always cherishes him and the top's friends gave his concerns about how the top isn't getting a girlfriend because the bottom pampers him (the bottom is already a worker and I think the top is graduating? He's still a student) and the top basically tried to experiment on what the bottom's reaction if he said he had a girlfriend.

When that happened he expected the bottom to lash out and get angry but he ended up being happy about it which caught the top off guard and he asked why he's acting like that when the bottom is obsessed with him. But the bottom said that he could still cherish him through his children cause the top still has his genes on the his children…

Can you help me find this Manga?