More spoilers (from the damn link I can't seem to share, I'm crying, I wish to help the masses)
.
.
.
.
.
.
It seems that this event leads to The bite finally happening ヾ(❀╹◡╹)ノ~ I can't wait for the translation because it looks so beautiful. This author really is skilled at highlighting the ugly reality (nearly choking out your own brother with your pheromones when jealous) to the poetic romantic side of the omegaverse concept.

Takai's brother go to their room and Nishio tried to kiss takai's brother and struddle him because he mistoke him as takai coz they kinda have similar pheromone and takai nowhere to be found when he awake in vol 5 ╥﹏╥ and takai got angry and tried to choke his brother with his pheromone coz his jealous. Cant wait for volume 5 coz its already chap 24 on bato last time huaa