My good-looking best friend always flirts with me

Ichika Seta attacks her childhood friend's male friend by bouncing her big butt without wearing underwear! Since childhood, Ichika has loved Shinichi, but Ichika is not good at love. One day, I went to Shinichi's house to ask for a taste at a cafe opened by my parents, but I was shocked to learn that Shinichi had a girlfriend. However, Ichika, who thinks she can't back down at this point, tries to get butt-loving Shinichi back by wearing an extreme pair of panties.