√Horikita Room. 4.5

This is the overall fifth chapter of You-Zitsu: √Horikita spin-off manga series.

Trivia

 * In the first release on Monthly Comic Alive December 2017 issue, it served as a supplementary part along with Room. 5. However, in ' and later, ' releases, it was combined into Room. 4. This heavily implies it is an actual part of Room. 4 due to unfinished storyline of that chapter, but was split into two parts under unknown circumstances.