YuChan

FL killed her dad because her other “dad,” who has red hair, told her to do it. But it turns out the person she killed was her real dad, and the red-haired dude liked her mom, so he wanted to kill everything that was in the way.
Somehow, she travels back to the past, now knowing the red-haired dude isn’t her dad and is trying to make her kill her real dad. She also meets someone in the middle of the night — a young boy — and she gives him a message. Later, he tells her real parents when he comes to congratulate them because the mom was pregnant. He sees the mom's hair and remembers what FL said, then tells the mom about it. I believe her message was something like “I know what going on and who I am but for now wait for me” or something like that

I've been searching for this manga, but I can't remember the title. It's about a guy who enjoys dressing like a girl, and I think the female lead confesses to him at some point also I believe he doesn’t like seeing himself as a boy so he dress like a girl though I'm not entirely sure. What I do clearly remember is that there are a pair of twin girls who end up dating another pair of twin boys. One of the twin boys had always wanted to date twin girls, and because of this one of the twin girls thought he was just playing with other feelings and hated him for that .