I think you should, and can, just watch better anime and hentai. This doesn't really do either super well, but it's not like offensively bad either -- I guess if you have a thing for firefighters or like bad-to-alright hentai, watch it.
I am picking "Not Recommended" because I do think most people won't really like it, or will actively dislike it. -- It's a hentai about a firefighter and this girl who've been childhood friends. Seems sweet, but neither the sex they have nor their relationship itself is really noteworthy. Honestly, sometimes it was just kind of boring? Usually there's at least a few moments between a couple that really cement why they're together, and why they're good together, but I never really saw any of those moments between them. Like, him saving her from the fire is kind of his job. He's literally paid to do that, I would hope he'd actively try to do that.
That being said, it is a little silly. I did find myself laughing sometimes, and just having fun with it. But I do think the reason I did find this as enjoyable as I personally did, was because I watched it with a friend. I think if I watched it by myself, I would have actively disliked it a lot more.
As a small side note, and small spoiler here ( literally first episode ), but if my apartment burned down, and I lost most of my belonging... I would not be having sex with anyone. They could have started this any other way, and I think this anime would have been a lot better if that wasn't the event that caused everything. Even just a smaller fire, like a kitchen fire or something, could have worked just as well.