leave it to me (yandere boy x yandere reader)

muesume?!

Couple if days had past when Lionel had moved in with you. You and Lionel made a rule for each other:
1. Don't go into each others room
2. Never walk around the house naked
3. You have to do only your chores
4. Make your own food

So far, you two haven't broken those rules. "I'm gonna be right back. Gotta do some errands." you said to Lionel. You closed the door behind you and started going to the book store (you finished a book and you were ready to read the other book).

You were there finding the book when you heard someone talking on the phone really loud. "Yeah like oh em gee. When you said cute, I thought he was like eh', but I was wrong. He was hot!!" the girl said. "Excuse me ma'am. You need to keep the no-" you stopped talking when you saw muesume they talking. "I'm gonna have to call you back. Bye bestie~." she said, then hung up.

"What are you doing here?" you said. "Um, I'm here to meet my friend. What about you?" she said. "None of your business. And is your friend a friend that you would betray, like me?" you said. "No. She just likes reading." muesume obviously lied.

"Anyways, I heard you have a new roomie, and he's a boy!" she said. "At least he follows the rules we made besides you." you said. "Well I would like to meet him." she said. "Fine." you said. Muesume followed you to the apartment.

Time skip

You guys arrived at the apartment. You opened the door and muesume was shocked of how the place looked. "You jelly?" you smirked. "You home already?" Lionel came out from his room. Muesume's eyes widened. "So he's your roommate now?" muesume said, pointing at Lionel. "Yep. And he's a better roommate then you." you said.

Muesume wanted to stay for a while talking to you guys. She was mostly looking at Lionel. Your eyes twitched. "Uh (y/n) why is she staring at me?" Lionel said. "I think she likes you." you said as you grinded your teeth together.

"... Well Muesume it was nice meeting you. But me and (y/n) have things to do." Lionel said. "Wait you two are dating?!" muesume yelled. "N-no! Not like that! We have chores to do. So please leave!" Lionel stuttered a little. Muesume left the apartment and Lionel closed the door.

He turned around to see me holding a knife in my hands. "Woah woah woah! Put. The knife. Down." Lionel said, running towards me. You just standed there, frozed while Lionel grab the knife out of your hand.

"Maybe you need some rest." Lionel said. "Yeah. That's a good idea." you said, as you started walking to your room. You closed the door behind you and started mumbling things under your breath. "She should've not done that."