Male! Chara and Frisk x Female Reader

Determination

(Y/n) currently sat at her kitchen table, Frisk sitting to her left and Chara to her right. She slowly picked at her food, eating small bits of it at a time. Suddenly, the front door opened. (Y/n)'s mother rushed in- a small box in her hands.

"Hi sweetie." Her mother said, taking a small note of how there were now two boys with (y/n). She didn't really care. She held the box out to her daughter who gently took it.

"I know times are hard, and they're gonna be hard for a long time, but hopefully this helps, even a little bit."

(Y/n) opened the box to see a small silver bracelet, with a single small, red heart charm. How ironic. She placed the bracelet on her wrist. It fit perfectly.

"Thank you." She whispered and her mother hugged her. Then, she pulled away.

"How about you and your friends go check out the new nice cream place? Here," her mother started, "take this." She gave (y/n) some money. "Go get yourselves something tasty. I'll clean up here." Chara rolled his eyes and Frisk stood up with a smile.

"That sounds like a great idea. Thank you." Her mother nodded and (y/n) and Chara stood up and walked towards the door before (y/n) stopped.

"(Y/n)?" Asked Frisk.

"I need a moment to get ready. Please hang on." She said as she rushed into her room, closing the door behind her so the boys couldn't see her get changed. Not that it would be a bad th- bad (y/n). No naughty thoughts, not yet anyway. She decided to get changed and fix up her  hair. She stood in front of a mirror. It's you. She started to leave the room before something caught her eye. Something small and shiny laid on the floor. She touched it and were filled with warmth. A black box appeared in front of you. It gave her two options, to save or return. She chose to touch save and see what happens. Nothing. The box just disappeared. She shrugged and walked towards the door. She opened the door and she noticed the two boys were glaring at each other before looking at her. Their eyes softened.

"You ready?" Asked Chara and she nodded. The trio made their way out of the house and down the street, making small conversation here and there. They then reached the nice cream place before heading inside. You three order you nice creams from the nice blue monster who stood at the cash register and then sat down at one of the tables inside the place. Chara licked his chocolate nice cream.

"You know, this is one of the best things I've ever put inside my mouth." Chara said with a smile.

Frisk nodded, for once agreeing with a smile of his own as he enjoyed his vanilla nice cream.

(Y/n) softly licked her (f/f) flavored nice cream. Both boys looked at (y/n) with concern.

Frisk asked, "What do you think of the nice cream, (y/n)?"

"It's good." She started simply. The three then sat in silence while eating their nice creams. Chara was the first to  finish. Also the first to speak up, something strange gleamed in his eyes.

"(Y/n)?" He said, causing the girl to look up at him.

"Yes?" She asked.

Chara grinned madly. "I'm bored, let's have some fun." With that, Chara suddenly disappeared.

"What the hell?" Frisk asked as (y/n) stood up and laughed. Frisk looked at her in shock.

"(Y/n)?!"

"She" looked at him, her eyes suddenly red. Frisk knew instantly what was wrong. "Chara?!"

"What? I said I wanted to have fun." Chara said inside of (y/n)'s body. He licked "his" lips. "Not exactly how I wanted to be inside her, but whatever. I'm off to test something out, later." He said ready to leave, but Frisk grabbed "his" arm.

Frisk opened his eyes ever so slightly. "Get. The. Hell. Out. Of. Her."

Chara giggled. "Oooh, scary. Fine, fine. Have it your way. But don't think this means I'll be gone or anything. Sooner or later I'll have her. I don't care who gets in my way, I'll cut them all down."
With that, Chara left as her eyes went back to their normal (e/c) as she looked at Frisk.

"Frisk? What- what happened? I'm so sleep-" she tried to finished as she collapsed in Frisk's arms, fall completely unconscious.

"Is she okay?!" The store own yelled.

"She's fine." Frisk said with a small, sweet smile. "She just needs some rest."

After a few hours, Frisk found himself sitting on the edge of (y/n)'s bed, silently watching her. He came back to her house and told her mother she fainted. Her mother told him it was probably because the lost of her friend. She told him to bring her into her room. Her mother had to leave because her work called and she asked Frisk to look after her until she got back, which frisk happily agreed to. So here he sat, gently playing with her hair. He already called his mother and told her he had to stay out late to take care of (y/n) and his mother was fine with that.

"Oh (y/n)," Frisk whispered, the light of the moon being the only source of light. "I'm sorry I couldn't protect you. Don't worry though, I promise to protect you from now on. I won't let anyone take you away." He smiled before the sound of clapping filled the room.

"Aw, how cute." Chara said as he appeared in the room.

Frisk glared at him. "The hell do you want?" He asked, venom lacing his voice.

Chara just giggled. "So mean. Anyway, I got an idea one that you just might like." Frisk waited for him to go on. "A game, so to speak. We'll only have until school starts up again in the fall. We'll both convince her that one of us is best for her. Whoever she choices as her lover at the end wins, and the other has to leave them alone. Sound like fun?"

Chars waited while Frisk thought about it. Finally, after some time, Frisk let out a sigh. "Fine, I agree."

Chara grinned. "Great, game starts tomorrow. Later." Chara disappeared. Frisk was concerned about what would happen. Then, he looked down at (y/n) and was filled with newfound determination. No matter what will happen, he'll make sure to win. After all, he and (y/n) were destined to be together- they just had to be.