A Go-Toubun No Hanayome alternate ending fan comic by Kosmos Beta starting from chapter 113 in which Uesugi Fuutarou chooses Nakano Nino.
Japanese version: https://www.pixiv.net/user/52200937/series/86809
English version: https://www.pixiv.net/user/52200937/series/107622
Chinese version: https://www.pixiv.net/user/52200937/series/86810
Chapter 2: post #10480193
Chapter 3: post #10488420
Chapter 4: post #10555486