$R_{\mu \nu}$

$R_{\mu \nu}$

Ricci ≠ Riichi BGM Riichi - Nihon Pro Mahjong Kishikai Kanshuu - Pro ni naru Mahjong DS inspired by ↓ https://www.nicovideo.jp/watch/sm41662541#ytpmv #nobgm

http://www.nicovideo.jp/watch/sm44460255