Wheb you tell your boyfriend to die or she will do it herself =D well koro sensei is not really a fitting boyfriend for Kayano but just stating an example
Of the few scenes of an anime that have left me really surprised, I did not have spoiler, I did not know anything and when I saw it I was surprised, I finished the cap and I still did not believe it, they really knew how to surprise us with kayano
When Kayano asks him to save her in the end, it gave me reap goosebumps. It was a really heartbreaking moment for Kayano to attack him like this and for Koro sensei to see her like this. I mean WOW!
Funfact: the mangaka actually sneaks kayano's tentacles into earlier chapters of the manga at least 3 times before the big reveal. Even as early as chapter 31. (See if you can find it ;-D)
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-PYyQ5cTtp7o.html This is a link to the OST. It’s not on the official sound track, which is why it’s so hard to find anything about it. Hope this helps.