Allergy with aphrodisiacs makes the insertion more sensitive -Slurpy orgasm even with misunderstanding

"No...... wait. If you put your tongue in...... no!" –One day, it was decided that Rina was staying at Tatsuya's house since her parents went on a vacation. Tatsuya is nervous about his childhood friend's first visit in a long time and is about to make coffee when he notices a strange shaped sugar on the shelf. The package said it was sugar, so he put it in the coffee and served it without paying attention, and Rina began to act strangely. She was breathing heavily, and she began to sweat, even though the heater was not on. On top of that, she took off her jacket and started asking Tatsuya out! Tatsuya did not understand why, but he was a man too and could not resist the temptation. When he took off Rina's underwear, her fine growing tits tempted Tatsuya. Rina turns away, but Tatsuya couldn't resist, and when he reaches for her tits, her pussy was already soaking wet. Unable to resist, he inserts his tongue into her and...... (Source: Coolmic) Note: Released in 18 episodes and sold as 6 chapters.