https://www.dlsite.com/books/work/=/product_id/BJ208379.html
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When the chime rings, they go into heat in 5 seconds - Delivery girls cum and leak with aphrodisiac salt candy...

My body is burning with aphrodisiac... My pussy is getting wet in front of the entrance... My knees are shaking... I can't stand any longer... Then the chime rings...!
--The main character, Tamura, is a NEET who wants to become a writer.
His only pleasure is a small conversation with Yuki, a delivery girl. Tamura wants to get close to Yuki, but he doesn't have the courage to do so... He plans to make Yuki eat salt candy containing an aphrodisiac, and he succeeds!
He then starts to touch Yuki's body, calling it heat stroke, and violates her as much as he wants!
But someone comes outside the door...!

English Webtoon version (1-18): https://e-hentai.org/g/1593962/0efe03ad12/