Kimama ni UpDown

About this title

Okano Natsumi, thanks to the wonders of science, can ingest a super pill called "Senobiiiru" to become an adult for a short period of time. As she enters the adult world, she deals with a train molester, her strict teacher, a boyfriend that was playing with her heart, a blackmailer, and various other problems. (Source: Taruby)