I Get So Much Pain If I Don't Kiss Someone

I was forcibly bound to a Kissing System.

If I don't kiss someone, I suffer unbearable pain.

Even worse, I'm trapped with my crazy junior fellow disciple.

After hesitating for ages, I finally decide to just endure it. Unexpectedly, my crazy junior fellow disciple says:

"I didn't know you had such good stamina, Senior Sister."

Me: "???"

"Otherwise, why do you think I got trapped in this place?"

Theme: Keep striving for progress.