Kurofuku was literally fired from the Institute, both because incompetence and having emotional ties with their test subjects, yet he didn't realise it by now?
Murakami didn't thought through about witches fragile existence, they were chasing time until drugs run out and now inevitable hatching of Drasil, sure he is loving only one person who now hates him, but they all also need to stop being jealous and face the "harem" route because it is interfering with their goals not to die with regrets.
Well, finally Kuroha got ahold of her notebook, thinking he is a player because he kisses girls around... but past Kuroha knew he only set his eyes on her and it didn't matter.
Now Murakami is in "harem" route, will try to make them not having regrets but Kuroha probably won't let that happen...