Mihiro, the younger sister, learns that her unpopular older brother has finally gotten a girlfriend. Mihiro, who can't honestly be happy, eventually realizes her own feelings... "I... I liked my older brother..." The day before the date, "If you cum right away, you'll be hated. I'll be your practice partner," starting with a passionate kiss, footjob, deep throat, tongue-on-the-roof ejaculation, and then "You can't take off the condom," "Use Mihiro's pussy as much as you like," "You can cum whenever you want," shaking her big ass for a face that doesn't match it, a sex education lesson for her brother. Full subjective view with 5 creampies full of love! *Some scenes have been processed using generative AI.