Hi, I read this manga a bit ago and can't remember what it's called.

It's about these two best friends. And one of the best friends falls in love with this really young kid. (that's the weird part) but the main story is about the other best friend having to keep this secret from the father of the young kid whom he eventually falls in love with.

I really want to find it but have had no luck. Any help would be great. Thank you!

Dear. Gentle Papa