a senior always helps an incompetent junior. he likes her and gets drunk, changing clothes on the spot due to heat. she shows off her favorite underwear. ordered by boss to remove garter. changes into yukata and goes to sleep. junior wakes up to senior's loud snore. senior's yukata is open, revealing large breasts. junior touches them, senior pretends to sleep but actually invites him. senior removes glasses, kisses, and asks to insert. they have sex in various positions, including missionary, doggy, and cowgirl. senior enjoys it and orgasms multiple times. they discuss the next business trip together. two colleagues from different departments change into yukata and go to sleep back to back. man steals glances, woman blushes. man wakes up to see woman's yukata open, revealing breasts. he touches and kisses them, woman wakes up. man confesses his feelings, woman agrees to sex. they have sex in various positions, including missionary, cowgirl, and doggy. two colleagues who dislike each other drink alcohol to change mood. man is ordered to negotiate with inn staff. they argue more, woman sits in corner. drunk, they complain about various things. they change into yukata and go to sleep. man can't sleep, woman falls asleep and rolls over, revealing breasts. man touches them and puts hand in pants. woman wakes up, man confesses his feelings. they have sex in various positions, including missionary and cowgirl. woman orgasms multiple times.