I forgot to do Day 17 yesterday so I'll do both Day 17 and Day 18 today

Day 17 - Favorite Original Songs by RAISE A SUILEN

My favorite original songs by them so far are !NVADE SHOW! and SOUL SOLDER

Soul Soldier doesn't have a thumbnail cover from the game yet :(

Day 18 - Favorite Cover Songs by Poppin' Party

My favorite cover songs by Poppin' Party so far are Cherry Bomb and Natsumatsuri.

Credits to Riru for making this challenge board.