I think it's more than on "Why did he hid the child" and not "What did the seme do for the uke to hide their child"...I think it's more on the short-comings of the uke; his cowardness and insecurity—and also the fact that they did the deed on seme's rut cause of the hidden agenda of the uke which it to have the seme's baby. I'm not defending the uke about hiding their child though, this is just what I think after reading the first season.

I am biased because I don’t like this story trope of the hiding the kid from the ML when there’s no toxicity. I get it in toxic BLs, but when it’s unnecessary I’m just like mmmkay come on. Especially when the ML already told the MC his feelings and is clearly nice to him? What’s the point? Overall, story a no, but it looks cute.