Gaster AU x Reader ONESHOTS

Glitchtale x Kind! Love! Reader

HEEEY! So. Yeah... More serious feels. Also, I'm not planning on making a part 2 unless you guys want one. Plus, your advice on my half sister is working. Thx!

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"Aku! Look at me!"

You were called to Toriel's school again since Aku was losing control of (his/her) fear soul. Everyone was watching because if you failed... Aku would be taken. Tears were streaming from your eyes as Aku tried to move your hands away. You kept your grip firm.

"AKU! PLEASE!" You begged as your eyes and small strain of hair glowed light pink. Aku was crying as you tried not to wail in pain. "It's useless. We should stop her." Undyne growled as Sans nodded. Gaster kept watching as you pulled Aku into a hug.

"AKU! AKU PLEASE!"

Aku gasped as (his/her) eyes snapped to a sunset color. "Aku... Aku..." You whimpered as you squeezed (him/her) slightly. "(Y..y/n)?" You gasped before you started to cry with happiness. "Aku! Oh Aku!" Aku wrapped (his/her) arms around you as you nuzzled (his/her) hair.

~ Time Skip ~

Gaster was helping Aku with (his/her) magic when you walked in with three icecream bars. "Hi guys!" You greeted. "(Y/n)! Look at this!" Aku said as he made a small pink firework. "That's so cool lil bro!" You said as you gave him the smallest icecream bar.

You handed Gaster the biggest one as you unwrapped the second smallest. "I want to show Frisk!" Aku said before he ran out. Gaster was about to open his icecream bar when he heard you sniffle. He looked at you as light pink tears slowly rolled down your face.

"(Y/n)?" Gaster said as he placed his hand on your shoulder. You dropped the icecream bar and hugged Gaster before sobbing into his chest. Gaster flinched with a slight blush before he used his magic to lift his icecream bar into the air and wrapped his arms around you.

You kept crying as Gaster rubbed your back before you were just hiccuping and whimpering. "(Y/n), talk to me, what's wrong?" Gaster asked as he nuzzled your hair. "I..m I'm scared. I'm scared that... Aku will... be ripped away from me." You answered as a small tear rolled down your face.

Gaster was silent for a minute. Undyne had threatened you about keeping Aku in control. "That won't happen." Gaster stated before leaving a kiss on the top of your head. You blushed lightly before you nodded slowly. Gaster kept his arms around you as he sighed softly.

"I promise."