Hello and salutations!
Yes, this is indeed a KARAMATSU X F!READER. I'm terribly sorry if you don't want female pronouns, I'm terribly sorry, this book won't be ideal for you. You can search for another book, there are tons of other ones! Sorry bout that!!
Disclaimer: I do not own the anime, "Osomatsu-San" ("Mr. Osomatsu") and nothing of it. The only thing I own is this digital story, and the plot, but not the characters. Sorry, no sue, thanks pal.
WARNING: This story will contain Adult Themes. Such as, sex, foul language, violence, and perhaps more. I will put up warning for the following if needed. If I forget, always message me about it, I'd hate it if someone was uncomfortable and didn't expect to read such. Thank you.
In total:
- female reader
-Karamatsu x f!reader
-contains Adult Themes
-I do not own this anime. Just this plot in my digital story
-enjoy <33
And yes, the title is from the song, "Absolutely Smitten," by; dodie . I really love her work, it's very nice to listen to. You should give her a try!!