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Dazai turned around when he felt a tug on his sleeve. "Chibi." He acknowledged the other's presence, promptly shifting his attention to correct the placement of the ceiling decoration before fully focusing on the redhead. "What's wrong?" He asked his boyfriend.
"I have to go home." Chuuya announced. He expected the pout and whine that came from the taller one. "Chuuya~! Are you so cruel to leave me alone to do all these!? What if I pass out from exhaustion? Worse, what if I die!?"
Chuuya rolled his eyes. "Then you'd finally get what you want." He said jokingly, brushing away loose strands that got stuck on Dazai's face. "You think I trust you with decorating? I would have stayed if I can." He wrapped his arms around Dazai's shoulder when the taller one held onto his waist.
"That's a slander to my decorating skill, Chibi. How extremely rude of you." Dazai muttered, pushing until they were all alone, inside the nearest room.
"Hell, Christmas might turn into Halloween if you're left unsupervised. That's why I'm very hesitant to leave you alone. Atsushi-kun had gone home too." He sighed, pressing closer now they have privacy.
"Did something happen?" Dazai leaned down to kiss him briefly. "You look worried." He muttered before resuming the kiss.
"Kyouka-chan is down with a fever." Dazai stopped kissing him. "Ane-san has to leave to attend to an urgent matter so she'll be home alone. That's why I have to go."
"Go, then." The brunet created some space between them, cupping Chuuya's cheek. "I'll visit once I'm done here."
"Okay. I don't want to see bandages hanging all over tomorrow." The shorter one warned to which Dazai laughed at.
"No promise, Chibi. Now go, take good care of Kyouka-chan."
Chuuya nodded, gathering his belongings and he pecked Dazai's lips before running his way home.
Later on, Dazai did stop by Chuuya's house - Kouyou had given him a set of keys too with how often he comes - but when he found the two sleeping together, Kyouka safe inside her brother's embrace, he decided to let them be and go home; not before he sneak a kiss on Chuuya's lips and Kyouka's forehead anyway. Yes, he's that close with the youngest one already.
"Did you not come yesterday?" Chuuya asked as soon as Dazai arrived beside him, throwing his arm around Chuuya's shoulder.
"Good morning. I did, but Chuuya was sleeping soundly so I left." The redhead returned the greetings, grumbling when the taller moved to use him as his chin rest. "How's Kyouka-chan doing?"
"You could've woken me up." He muttered, jabbing Dazai on his gut for his : 'And risk Chibi shrinking? No way.' Before telling him about his little sister's condition. "The fever has gone down but it's still there. Ane-san's not allowing her to go anywhere, so she might have to cancel her Christmas plans."
"Ah.. I'll buy her a cake later." Dazai hummed, pulling his boyfriend along with him inside the building where they stopped to change into their indoor slippers.
"She'd love it." Chuuya smiled at his boyfriend's concern and walked to the hallway with him. He nodded his head in approval when he saw no bandages were used as decorations. "Good job." He praised and when he was about to continue his walk, he felt Dazai holding him by his shoulder. "What-?"
Chuuya's words were cut short by a sweet, chaste kiss on his lips. "Merry Christmas, Chibi." The brunet smiled at him, making Chuuya blush intensely. "Merry Christmas, idiot." He mumbled shyly, pulling his scarf to cover his face.
The ginger had barely taken 10 steps when he felt Dazai stopping him again with another kiss. "W-What's that for!" He hit the guy weakly. "There's people!"
Dazai grinned at him, boyish, and pointed above their heads. "Mistletoe. We should kiss underneath it." He said to which Chuuya rolled his eyes at and let it slide.
However, it kept happening and they're barely halfway to their classroom when Dazai stole another kiss from him. It's like the fifth time already!
"Oi, you bastard- Just how many of these things did you hang!?"
The brunet hummed, making a thinking gesture. "It's one per 10 steps. So if we're to walk around the whole school, there'd be more than a hundred!" He exclaimed way too cheerfully.
"Oh my God." Chuuya facepalmed. "This is why I don't trust you!" He groaned to his hand, speed walking to their classroom and upon opening the door, the first thing he noticed was the plant hanging on top of his desk. "I swear to fucking God, Osamu!"
" Fufu, Merry Christmas, Chibi."
And Dazai made sure to kiss Chuuya underneath every single mistletoe he had hung solely to see Chuuya's red cheeks and equally red, swollen and shiny lips.
It is indeed a very Merry Christmas.