No, she should delibireratly kiss the sister twice -_-At this point our resident losing heroine also has to "accidentally" kiss her boyfriend. Twice.
By the way, Murasaki’s are inverted
Holy crap MC-kun, you're so damn lucky to be around Sakaki
My fatigue had fatigue about itJust fucking kiss your boyfriend! Or go further and take him to bed!
Sakaki should just move out, as funny as the kiss gag has been, it's also been milked enough now.