Matsuda has confessed to Yoshimoto, even though he's a lady's man. Their boss gives Matsuda a candy that, when eaten, lets you control another person 1 time. He wishes to go home with Yoshimoto, who has sex with him of his own volition.
It's cute that the seme used the candy only to spend time with the uke (and proceeded to fake eat the candy to pretend to use it to have sex with the uke, but it was really consensual lololol)