THIS IS GETTING ANNOYING!

List of Warui Series:
Vol 1 Warui Koto Shitai [1-1]
Vol 2 Waruiko Demo Ii? [1-2]
Vol 3 Kirai ja nai Kedo [2-1]
Vol 4 Koi Ja nai Kedo [2-2]
--- Warui Koto Bakkashite Gomennasai [1-3 & 2-3]
Vol 5 Warui Yatsu Demo Ii [1-4]
Vol 6 Mujihi na Otoko [3-1]
Vol 7 Warui Koibito ja Dame? [1-5]
Vol 8 Kare ja nai kedo [2-4]
--- Warui ko Tachi no Bansan [1-6 & 2-5]
Vol 9 Mujihi na Anata [3-2]
Vol 10 Sunao ja nai Kedo [2-6]
Vol 11 Warui Ouji Demo Suki [1-7]
Vol 12 Mujihi na Karada [3-3]
Vol 13 Shouwaru Ookami ga Koi wo Shita Rashii [4-1]
Vol 14 Himitsu Ja Nai Kedo [2-7]
Vol 15 Masato-Sama no Urei Aru Nichijou ~to, Kare wo Aisuru Monotachi~ [5-1]

Every volume that has "Warui" is about MikadoXTowa
The ones with "Ja Nai kedo" is about RyuichiXShuji
The ones with "Mujihi" is about KuonXNanao

The others are other pairs.

Thank you ε=ε=(ノ≧∇≦)ノ

Thanks! ヾ(☆▽☆) this list is so useful, till now i was using this to keep track https://www.mangaupdates.com/series.html?id=11462