This edit is what made me watch the drama(I watched the drama in July 2021)) but I was so surprised to find out they weren't the main leads. This edit convinced me they were. After watching the show, I am glad they weren't. Eight and Saiko were much better together.
This is the only drama where I'm happy with it being sad or open ending because of how toxic and selfish ml was. He deserved it. Felt sad for both takauji and saiko.
It's an open ending in "kiss that kills " Kinda happy in "kiss that kills parallel" I recommend watching "kiss that kills parallel "episode 10 straight away after the main drama "kiss that kills"