Attack on titan
It was a normal day for these two friends Eren and Armin they were training until Captain Levi had something he needed to tell them he never told anyone else this so why he picked Eren and Armin no one was sure but he asked "Armin and Eren do you know what Age Regression is?" They both shook their heads and Levi said "Well it is when your head goes back to a younger age." He said "I know one of you is an age regressor I just want to know which one of you." Eren of course looked around Armin was too scared to admit anything but Levi had to find out and he asked "Armin are you the age regressor?" Armin didn't want to admit it but nodded Levi asked "Do you have a caregiver?" Armin shook his head and Levi volunteered himself to be Armin's caregiver. Armin said "I'll let you know if I need you." Then he asked" Would that be okay?" Levi nodded and that night is when Armin started to regress and he ran to Levi's room on knocked on his door Levi opened the door and asked "Armin are you feeling little?" Armin nodded Levi said "I am assuming you want me to take care of you." Armin nodded and said "You told me and Eren to come to you when we age regressed remember." Levi said "I only volunteered because you don't have a caregiver." Armin stammered "C-Can I call you d-d-dad or papa?" Levi nodded and he said "Just don't make it a habit if you are able to remember what happened when you are age regress." Armin nodded Levi was kind of concerned why Armin hasn't fully regressed yet he asked "Is there something that helps you fully age regress?" Armin said "Yes but it's embarrassing." Levi said "Armin it's just us you don't have to be afraid just tell me please." Armin mumbled "Someone holding me." He asked in a soft voice "Could you please speak up?" Armin said "Someone holding me like a baby or small child." Levi nodded and opened his arms as if to say 'come here.' Armin walked over to Levi and Levi pulled him down to sit on his lap and Levi did what he could and Armin fully regressed and Levi asked "How old do you feel little one?" Armin held up two fingers and Levi said "Okay well we should make you a bottle and then get you into bed." Levi hadn't noticed that Armin carried his backpack with him. He went through it and found all of Armin's little gear but the bag was labeled age one and now he had to find the bag labeled age two he found it and got everything he might need out of it and thank goodness Armin was a prepared kid. Levi got the bottle from the bag and went downstairs to make Armin a bottle and Armin's stomach making itself known and Armin whined a bit and Levi said "Don't worry I'm going as fast as I can I know you are hungry." Levi wanted to get Armin fed and to bed but of course the microwave was taking forever and Levi brought Armin's paci with him and Armin really was getting tired but Levi said "Please Armin stay awake please." The microwave beeped and Levi got the bottle out and carried Armin back to his room and fed him Armin was happy to get something into his stomach and Levi was sitting in his rocking chair that he got from Erwin. Levi was happy that it became useful tonight. After Armin finished the bottle Levi had to burp him and he had a rag that was used in case Armin spit up when Levi burped him. Armin was happy and full and said "Cuddles." Levi said "Oh little one I'm sorry I've got paperwork to do." Armin asked "Cuddles for a bit dada pwease?" Levi smiled and said "Okay baby just promise me you will sleep after okay." Armin nodded and he went to sleep pretty quick and Levi got up and tried to finish his paperwork. He got it done and Armin woke up at 6:00 and Levi said "Good morning Armin." Armin replied "Morning Captain Levi sir." Levi knew that he was back to his old self Armin only regressed once a week.