Other misc TL notes:
That fridge was all tiny handwriting. It was definitely practice.
If you're like 'wtf is mekabu' (middle shelf, on the left) here's a link. I'm also fairly certain you'll regret looking it up afterwards, but hey.
I'm also not 100% sure on the 'G-spot' thing. I mean, I'm pretty sure I'm right since it fits the context of a giant capital G (not exactly something you see a lot of in manga), but it's also possibly some slangy/meme reference thing that I've never run across. It's definitely not 'cockroach', at any rate.
Also also the title contains one of those weirdly specific Japanese words you get when you smash a few kanji together that doesn't really have a simple translation in English: "haizanhei". It's like the trope where two Sengoku era warlords clash, one army wins and the other one gets destroyed except for a few lucky scattered survivors who managed to get away and not end up dead in a ditch etc etc. Those dudes are the haizanhei (and one is usually the MC of whatever). So the title is basically a joke reframing the generation gap (and also idol groups battling to make it big) in the context of feudal armies. Heisei/Millenials/Sumire's idol group lost the war, she survived but is powerless/irrelevant/over the hill, that kind of thing.
Oh, and Sumire vol 1 digital is on sale for 77(!) yen on Bookwalker this week.