Rurou no Kohakuhime (流浪の琥珀姫) (3/4/5/8; 495 notes on Oni)
February's DLC song pack for Session de Dodon ga Don has brought up a new Namco Original track from the recurring composer/singer couple of Drop and Yura Hatsuki, as testified by a tweet left from the singer herself last year (link)!
On the difficulty spectrum, this one fares on the average side of things, with the predominant 1/16 notecharting and 3/4 beat stanzas being the signature features of its Oni mode.