
There are other chubby girls and yet he remains faithful to his girlfriend so its clear her body isn't the only reason he's with her.

i think its wonderful. girls get complimented all the time for "being so skinny" but in this manga tatami loves tsumugi just the way she is, her chubbiness just makes him love her more. looks are almost always the first thing we see and are attracted to.

I had a bf like Tagami. It wasn't that bad, and all the squeezing and squishing gave me a little confidence. It's just like cuddling

I think we're supposed to find his fetish odd. But at the same time, girls might constantly have their smooth hair touched or their figures praised or their shy manner praised or their clear complexions praised. In this case, her fat is pleasing to him, so he likes touching her fat flesh. It's a way to visualize (this is a manga, after all) how he finds her body type just perfect.
I think I'm the only person who finds this manga kinda offensive to chubby people. Personally, if I had a boy tell me (to my face) that a big reason why he wanted to date me is because he likes the feeling of fatty skin in his palms and constantly felt the need to squeeze me..... I would slap him so hard his ancestors would feel it. I would feel so horrible about myself! I'm not saying there's anything wrong with being a "chubby chaser".... but to constantly treat her like she's some kind of over stuffed bear is just kinda strange.