Divine's manga / #secret president(1)

warui series has 3 couples: [1-?], [2-?] & [3-?] their stories have different numbers of volumes. the most volumes have first couple [1-1]- that's the first volume of the first couple, [1-2]-the second one... and so one the series goes like this: 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] Vol 9 Mujihi na Anata [3-2]