The contents of the package I received was an unexpectedly sexy bra! - ? - Yamada accidentally receives and opens a courier mail addressed to Yumiko, a beautiful married woman who lives in the apartment next door. - When I hurriedly took my luggage to my neighbor's door, he asked, "Would you like some tea as a thank you for taking the trouble to deliver it?" - Yamada, a virgin, can't stop pounding when she sees the volume of her voluptuous raw breasts that can be seen through the gap in her shirt with her chest wide open. - "...Hey, do you think this underwear is good?" Yumiko suddenly changes into the bra that just arrived and asks Yamada for his opinion. - Yes, the whole thing was a honey trap disguised as a coincidence by a cheating wife who had too much free time and sexual desire.