beta
In the last chapter they switch
in the first story the seme dreams that he is topped by the uke. It's the third chapter.
The side couple switches positions. the story about them is in vol. 5 ch. 4.1 - 4.2 and vol. 9 ch. 6.2 (here you find the switch). the side couple are the older bro of the main seme and his best friend from school days.
switch in chapter 6 but the mangaka didn't draw the second scene -.-
switching positions in chapter 9
Dark Avengers dj - Sou ja Nakya Komaru