Ok, let's recap the good points of this manga: good art, nice start, smart FCs
Put that aside: MC is worse every step, compulsive liar, coward and childish, I lost every simpathy for him.
Even the smart grandmother is becoming dumb for following his steps.
I agree with others, pls Ruka and Mizuhara, get well together, as friends or whatever you like, and leave that dumbass stuck, what a dream!