Ryoichi Hirose (廣瀬遼一 Hirose Ryoichi) is an author and potential romance option in Seduced in the Sleepless City. He is voiced by Sakurai Takahiro in a short animation to celebrate his #1 ranking in Voltage's Character General Elections 2012.
- Ryoichi was born on December 3rd. Presumably, he was born in 1985.
- Ryoichi ranked #1 in Voltage's Characters General Elections in 2012 and 2013. He then dropped to #2 in their 2014 elections with a total of 102,513 votes.