A man misses the last train after getting rowdy at an izakaya following work. Then, his female senior colleague Suzume asks, 'Want to stay over at my place?' and he ends up staying at her place... Normally unassuming and overlooked for her large breasts, she's not wearing a bra, which excites him into having sex with her forcefully. However, this only ignites Suzume's desires, leading to multiple rounds of sex throughout the night until morning.
