大好きなお兄ちゃんの堕とし方 ～ツンツン妹は、兄にデレデレでした～

One late night, as I was sleeping, I felt something warm and damp covering my face.
Half-asleep, I barely opened my eyes to see…
"Eh… ah… huh?! Wha—?!"
To my shock, Seira was pressing her most intimate part against my face.
"Oh, you’re awake? Hehe… you can’t escape, you know♪"
Panicking, I tried to get away, but…
Seira had already prepared for this. She’d tied me to the bed.