Japanese title: がんばれ!(泣)こがさちゃん!!総集編：下巻

Space: Te-43a　Circle: Lunatic Reform School
The conclusion of the series, the 120-page "Farewell, Kogasa-san", plus an all-new manga drawn for the occasion! (※You can start from Vol. 2/2 as well.)
I ended up with a lot of pages of newly done stuff, so I'm releasing them. (The printed version includes even more additional pages.)

Melon Books → I'm going to apply now.

Related pools in this series:
pool #1314 - Touhou - Do Your Best Kogasa-chan!!
pool #4464 - Touhou - Do Your Best, Kogasa-chan!! ~Return~
pool #9395 - Touhou - Hang in There! (Sob) Kogasa-chan!!―Charge into the SDM Next Door!
pool #11180 - Touhou - Hang in There! (Sob) Kogasa-chan!!―Farewell Kogasa-chan Part 1+2+3+4
Touhou - Do Your Best! (Sob) Kogasa-chan!! Omnibus: 2/2 (C94) (Warugaki)