Decided to pick up an airing show for a change (even though I think the season is almost over) and watched the first episode of Talentless Nana.
I already had it spoiled that she was evil/killed people but I didn't expect the seeming MC to die. I thought it would be more set up like she doesn't kill him right away for whatever reason and he is torn between being her friend/having a crush on her and finding her suspicious.
I'm guessing Nana is actually the real main character. That or the mysterious guy hiding his power. I'm guessing Nanao is actually dead and not just a fakeout because him coming back would automatically blow her cover.