Dekichatta Shitsuji

Briefly about Dekichatta Shitsuji manga:

Konno Wataru is a rich son who is studious and quite prideful. One day his butler, Azuma, comes and tells him that he’s going to have a baby sister…?! Amidst their instinct of a cat-dog relationship, things get a bit risqué ❤ Soon after this “incident”, the two notice the child who came out from between their legs. What kind of existence is this? And why does it follow Wataru everywhere? And what will happen to the baby girl now…?