In Bed With The Devil
The mangaka mentioned at the end that everyone liked Colin, the ditzy researcher, more than the ML. In my opinion that's because the ML is basically a butthead. He obviously doesn't understand women at all, and yet talks and acts as though he knows everything. Sorry to be crude and coarse, but that's a combination that could mess up a wet dream.
Master of Her Virtue
I will never again hurt a woman by letting her fall in love with me. Wow, here's a virgin nearly half my age. Baby! I really gotta get you in the rack! Can we say "hypocrite?" If he was any more full of excreta, the health department would shut him down.
His Heir, Her Honor