A K-ON non-H doujinshi! Scanned by me (Adorable Doujinshi Scanlations) https://adorable-scanlations.blogspot.com/
scan #246
the direct download link now leads to the translated version!
direct download link - https://www.mediafire.com/file/pyo7qnt2f1fvwe2/%2528C77%2529_%255BAtelier_Miyabi%252C_Munchhausen_Shoukougun_%2528Various%2529%255D_Houkago_Mugi_Time_%2528K-ON%2521%2529_%255BEnglish%255D_%255BN04H%255D.zip/file