Shiba-kun to Shepherd-san
I would say the one flaw with this manga is how young the uke looks, he's 20, there was no reason for him to look like a 10-year-old but if you can get past that, it is pretty cute and wholesome.
Behind The desk
The story feels very convoluted, the uke has an accommodating personality that leads to him being in an abusive relationship (that the author refuses to admit is abusive, and we have to continue to see the abuser for the rest of the story and are supposed to accept him as a regular character who even gets his own story). The dynamic of the main couple is confusing and honestly saddens me because the uke was allegedly in love with the seme for years yet when they reunite, seme falls in love with him right away, while the uke seems uninterested and condescending towards him, there are also a bunch of student characters whose names we're supposed to remember, they didn't even need to be in the story. The couple has some good moments, but those represent less than 40% of the whole manhwa. I do love the art style.
Unromantic
It is absolutely unacceptable the way the uke treats the seme, from being discriminatory against him by verbally abusing him to physically abusing him. I cannot believe people think this relationship is cute, it's revolting how lightly the seme takes the violence directed towards him as if it's a joke, he continues to like this man for no reason other than hormones. It's sad how stories like these are still regarded as romantic when they are simply abusive and sad.
Love Joto!