Why do side pairings end up so much better than the main ones?
I mean goddamn, look at this bantz.
Side couples can often be more stable than the main couple, since the main drama of the series isn't usually about them. This gives them more time to show off actually being a couple and they usually seem generally happier, since you don't have the ridiculous drama that usually comes with being the main couple.
Shu and Ruri are literally the only reason I finished Nisekoi