The main character asked Kitano-san to help him bathe. When it came time to wash his crotch...

"Oh ...... n~ I'm having trouble......"
"Oh...would it be too embarrassing if you get naked, too...?"

He couldn't resist the sight of her fluffy tits...

"I knew it... you've been holding back for a long time..."

"I'm about to come...? It's okay... let me cum inside you...?"

She reluctantly accepted when he got a little pushy. It's a sexual-healing session with a big-sister nurse!

(Source: DLSite, translated)

Note: Originally published for Comiket 96.