I know this is supposed to be "romantic" but he literally curse her to always know were she is against her will. Not to mention how he went full yandere with the intention to kill just because the other guy has feelings for her. I'm finding his latest actions more disturbing than cute
I thought the funny voices in his head in recent-ish chapters, and all his sudden dark aura-ish stuff, indicated something more sinister and mystical was going on than just him deciding to go full-blown yandere, especially since it's seemed to particularly be a thing since he got the partial brain-wipe...