The black hair and the black clothing blending into the background on page 18 is very aesthetically pleasing to me.
I'm also interested in Sera slowly isolating Sayuki (I'm a sucker for psychological romances )
Oh Sera. Everytime you have an angel for everyone else you usually have a selfish yandere at the center. And that gap moe is both cute and terrifying. Do not get in her way! That dude better watch it he set some death flags for himself.