Tail end of the second last chapter of Volume 8 (the last volume):
"Hey, Akira..."
"What?"
"Were you really awake back then? You know, the morning after we first slept together, I whispered something in your ear, right? Did you hear that?"
Still pressing her forehead against my chest, Akira shook her head. It tickled a little.
"Truth is, I don't clearly remember anything after 'actually'."
"I see..."
I was slightly relieved, but if that was the case, maybe this was the right time.
"Akira, lend me your ear for a sec."
"Eh? Sure, I don't mind..."
Akira wriggled her way up.
"I'm only going to say those words to you one more time. Actually... ──"
Because it was embarrassing, I told her by whispering into her ear.
My true feelings for Akira──
When I finished, Akira shot her head up.
In the dim light, I could see her surprised face. She was probably blushing furiously.
"Big bro, that was... Does that mean you've liked me from the start──"
"Look... I'm embarrassed, so please don't say it out loud..."
"Why didn't you tell me sooner!?"
"Well, uh... I thought it might have just been the all-nighter talking, so I cooled my head for a bit... And considering Dad and the others, I figured I should hold back..."
"Then why tell me right now!?"
"That's, um..."
It was deeply embarrassing to say it out loud, but...──
"I... I couldn't hold back anymore..."
At that, Akira suddenly hugged me.
"Mmmmmm...! I love youuu...!"
"H-Hey! Keep your voice down...!"
"Big bro, I really love you! I'm going to be by your side forever!"
It was a shame that I couldn't see Akira's joyous face clearly in this darkness.
However, well──maybe it was better this way.
My face had to be the reddest it had ever been right now. If Akira wasn't here, I might have been flailing my arms and legs around wildly.
I definitely didn't want anyone to see me like that.
Not as her brother, but as a man──
"Um, well then, Akira... is it okay?"
"Yeah... ──Come here, Big bro..."
Akira closed her eyes and puckered her lips.
I lifted my upper body slightly and brought my face closer to Akira's──
In the silence, the rustling of clothes, sighs, and the creaking of the bed intermingled.
The dark is something that stirs up anxiety and loneliness, but right there, our warmth undeniably existed.