The plot kicks off with a bang—literally. The protagonist, an ordinary high school boy named , is spending a peaceful afternoon at home when a girl suddenly crashes through his second-floor ceiling. That girl is Suzu , an attractive but deeply clumsy and airheaded classmate who has no idea how she ended up on Sachi’s floor (or inside his house).

UGUGU’s art style is a significant selling point of Joshiochi! . The artwork is clean, modern, and incredibly expressive. The artist excels at two things: capturing the female form (a staple of the ecchi genre) and conveying high-impact physical comedy.

The protagonist, a typical young man whose life is upended by a literal hole in his ceiling.

The girl from the second floor whose accidental fall kickstarts the series' events.