>>4471359
>>4471375
I couldn’t remember the name, but thankfully there aren’t a lot of manga with 9999 in the title. Though there are more than you’d think.

https://mangadex.org/title/6b0cc881-e67f-438a-a57e-b2c598509b12/kenshi-wo-mezashite-nyuugaku-shita-no-ni-mahou-tekisei-9999-nan-desu-kedo