IOSYS - Comical Mishaguji and Radiation + Omake english subtitles
Lyrics from Touhou Wiki.
Freezing and eating with Cirno and Suwako.
Use cc to read subtitles because attempting to format this gave me headaches.
Even though subtitling the omake would take a long time due to the references, it's safe to say that there are references to Doraemon, Zatch (Gash) Bell (oppai boing), possible Death Note one about Kira's laugh, Yu-Gi-Oh, Pokemon, and possible Ashita no Joe one. Feel free to comment if you've found others.