I honestly believe this manga is for a selective audience. The story pace is pretty slow, but well placed and the cast of characters isn't over-saturated, but they don't really stick out either. The MC is your typical nice guy wimp who backs out a lot, but unlike other MCs, he's self-aware of this weakness and is (very) slowly trying to fix that trait. I personally like this. The main heroine comes off as cool and aloof, but is more of tsundere than she lets on. It's IMPLIED she likes the MC in return, but to date nothing concrete has been confirmed. At bare minimum she respects him. The love rival is very assertive and knows what she wants, also in the same business as the main heroine. Her issue is not with the MC, like most of the cast (mostly), but the main heroine for being wishy-washy in her own way. There's a 3rd girl who's emotional support (we all know she doesn't stand a chance, but we can't help but cheer her on). Lastly is the ex girlfriend. She's a walking mystery. Straight from early on in Chapter 1 she broke up with him, but doesn't like that he is dating the heroine (it's obviously fake to the readers, but the cast doesn't know that. Someone else learns, but they're irrelevant for now.). It's unclear if she is jealous, a sadist who enjoy the MC being alone, regrets dumping him, or something else, but it's clear she is trying to interfere in his love life.
The central plot of them fake-dating involves both the grandmothers of the MC and heroine. The MC is weak-hearted but loves his grandmother dearly and doesn't want to break her heart. The heroine's doesn't have long and is trying to make her happy before she passes. The heroine is very strong-willed in her convictions and her future and doesn't cross any lines when on the job. Because of the dubious nature of her dating job (which in itself is harmless, but naturally has a bad reputation for the clients as well as the fake girlfriends), they are both trying to keep it a secret. I mean why not? In your early 20's and you using/doing a service like that? It's social suicide.
I've noticed the people who usually have issues use the term alpha/beta a lot. Outdated terms to justify their own desire to self-insert for their own shortcomings. "Macho men" in short. Don't judge negative reviews using such toxic terminology since all they're really after is a borderline hentai with an assertive MC. I'm not saying it doesn't have cringe-worthy moments now and then in the story, but I think it's a sweet romance story that doesn't go overboard.
I rate it 6 out of 10: Not the best, but still a good read.