This is addtional content that enables the following songs:

Ultimate taste
Wind of Faith
Stairway to Cherry Blossoms
Saishuu kichiku imouto Flandre-S(Sasuke Haraguchi was Brutal? remix)
Love-Colored Master Spark ~ NEETs ver.
The Footsteps That Summon Winter
Sekai Hifuu Club-ka Keikaku
Rock 'n' Rock 'n' Beat
Tenchi Amaneku Osameru wa Waga [X]VII Jo no Shinkou
The Gensokyo The Gods Loved

More details on the official game page of Extra Song Pack 5 ...