https://www.dlsite.com/maniax/work/=/product_id/RJ01534789
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_716065/

According to the afterward, this is a parody of something called Alien Muumuu.

Base +7, nuts987 +15

这个是外星人沐沐的同人吧，女主名字和外形都对得上

Base +5, yuekai005 +6, darkmuffin +6, 暗夜中光 +7, wel0789321 +6

@shiranai

Results from google is Me and the Alien MuMu (宇宙人ムームー, Uchūjin Mūmū; lit. 'Alien Mumu')

Base +7, nuts987 +15

Certainly it's this one

https://mangadex.org/title/b14fc4a3-652c-4bef-9d28-21f15b2fd0aa/alien-mumu

Base +24, nuts987 +15, ImoLoliLover +12

嚯，还有樱子

Base +6

it's a shame that mangadex took down a lot of series @Wilfriback

Base +6, ImoLoliLover +12

wish he would do more bonnie or nonon

Base +7, Manakemia +7

I think this is the closest I've seen this artist get to wholesome. She went on a date (for money), enjoyed herself, and then couldn't say no when her date got aggressive. He was hardly a gentlemen about it (which some girls like), but he escalated it several times and she did nothing. Then she went back to see him on a dangerous day and gave token resistance before agreeing to be impregnated.

I'm hardly fluent in Japanese, but I noticed that she frequently used much harsher language in her head. Like, the ojisan called her his woman, and in her head she said 'that's right, I'm ojisan's hole now'. I thought it was a nice touch that resonated with the rest of her actions.

Ignoring the age disparity, I'd say she's halfway responsible for not resisting her toxic personal fantasies.

Base +6