11渡くん OP・ゆうれいになりたい (Watari kun Is About to Collapse OP / I want to be your ghost) (オルゴール Music Box) Relaxu Animusic Box Collection, Vol. 57Pro Only
22渡くん OP・ゆうれいになりたい (Watari kun Is About to Collapse OP / I want to be your ghost) (PianoBox Music) Relaxu Anime PianoBox Collection, Vol. 57Pro Only
