I find it amusing and ironic that Wakana is actually the most empathetic and kind toward Sensei (Giving her head-pats and welcome to the harem lol) compared to our MC and her childhood friend (Yura)...just got to forgot and exclude the whole getting rid of part implied that might have been said or just in Sensei's head...
Damn though MC...be more nicer to your future harem member...I know she is not a 11 out of 10 beauty scale like Wakana but Sensei still is decent looking though I guess we can tell now that Yura and Wakana's blood taste much better. Wonder if closeness or the person's emotions affect blood taste for the MC? Hmm would having different blood types give off slight different taste for the MC, A, B, AB, O-.
Going to be amusing adding Sensei to the dynamics of MC's harem lol. Hopefully they can hang out for karaoke like a couple comment said, Sensei was too much of a 'good girl'.