Big Brother, Teach Me… Secret Health Class with Stepsister

Synopsis

It all started yesterday.

“Big brother, use your body as a teaching material and show me health ed!”

My stepsister Yuri attends a prestigious nursing academy and has been steadily working toward her dream of becoming a nurse. Or so I thought. Apparently, whenever the topic of male anatomy comes up in class, her mind goes completely blank.

But using my body as a teaching material for her practice? Is that really okay? Even if we’re not blood-related…

Before I can even process my thoughts, my stepsister comes home. She seems to have completely forgotten about last night’s promise. I breathe a sigh of relief.

There’s no way I could actually teach her health ed.

Just as I’m feeling reassured…

“Um… big brother? Tonight… can we have that health class lesson…?”

I find myself nodding at her words before I can think it through. What will happen tonight? The thought makes my heart race…