I was bored and tried Koikimo because it was recommended to me. From somewhere. I don't remember where. And I don't know why because this show's so fucking weird. It's not bad but it's closer to bad than it ever will be to being good. Random points below.
Age gap relationship: I could've overlooked this with a better story. It's always better to go with adult age-gaps imo. She's 17, I'm not gonna nitpick it that much. He's 27 though. The show plays it off as "how cool that older, hot guy is interested in her" but he actually comes off as a bit of a stunted loser who can only relate to a child.
Womanizer Character: He's a womanizer. Fine. I think this character type can be conveyed without being disgusting. The whole "what's her name" can be funny once or with a bit of spin on the joke, although it's otherwise trite and cliche. This show has no such spins to offer. "He such a maaaaan he dun know wamen's names because he's been with soooo many wamens." Give me a break. FFS, just look at your damn phone and read the name that last asked for a hookup.
Secret Masochist: The guy likes verbal abuse and the chick being disgusted with him. It'd be funny if it wasn't clearly a kink without the girl's consent. I also find it hard to believe this guy's kink has never been triggered before. The implication from this show is that he's soooo hot or whatever that no woman's ever called him a jerk or a creep before and gotten him hard from it. I refuse to believe this.
Cool Sister: I like the dude's little sister. Seems like a nice character.
Female Love Interest: She's actually okay. I don't find her obnoxious or anything. But homegirl needs to cover her mouth when she coughs.
Boundaries: He doesn't really respect her's and she puts up with it. Irl, you wouldn't blame the victim especially when she's a child. But it's okay. This is a cartoon. It's le funny ho ho. Crossing boundaries this egregiously just means it's TRUE love, y'all. At least according to fanfics I read in 1999.
CREEPER: Male Love Interest intimidates others who don't step into line with his wants. He looms over highschool boys that don't behave the way he wants. In the first episode, he assaults a woman by grinding a napkin into her face to violently wipe off her make-up and then threatens to pull out her real eyelashes when she bemoans he pulled off her fake ones. It's supposed to be funny, guise. Because women who wear makeup are, like, vapid hos and this woman was being bitch by telling a *checks notes* highschool girl that the older man grooming her is a womanizer.
This was the most disgusting scene I have ever seen in an anime romcom and that includes any show where the female love interest was nearly r@ped. At least when the latter happens, it's done by a bad guy who is clearly wrong and gets some sort of comeuppance. But in Koikimo, the male love interest just gets to assault a woman. I get it was supposed to be played off as a gag but it wasn't actually executed as a gag. There were no zany sound effects or zingers to cap a joke. He just violently rubs off her makeup and threatens her.
I'd have more respect for this show if this behavior was called out or were indicators of a future turn into a darker show. Like he starts murderin' people and sticking them in his van. Then we'd have a dark comedy. But this is supposed to be a romcom. And in a setting of sparkling eyes full of admiration and gifting a flower a day to court his lady love, he randomly assaults a woman.
Please, just watch Love is Hard for an Otaku with adorable adult couples.