This has 8 chapters on MyAnimeList
https://myanimelist.net/manga/113523/Urusai_kurai_no_Kokuhaku_Kudasai
This has 8 chapters on MyAnimeList
https://myanimelist.net/manga/113523/Urusai_kurai_no_Kokuhaku_Kudasai
On my anime list it has 7 chapters?
5 chapters, then two extras. The extra at the end from chapter 2 (the hair one) and the Study extra at the end of the volume (●'◡'●)ノ