On a Sunday, a couple attended a free yoga class hosted by their local municipality. Both having been inactive for some time, they tried out each yoga pose with curiosity, surprised by how much they sweated and becoming aware of the health benefits. However, the husband found himself increasingly distracted by his wife, Tsubaki Asuka. Every time she moved into a yoga pose, her bra clearly showed through her clothes. Her slender figure accentuated the outline, making it impossible for him to ignore. He became obsessed, paying close attention to every little movement she made throughout the day. Most of all, he grew anxious and uneasy at the thought of someone else catching a glimpse of her nipples peeking through her top.