Kawashima Ryuta Kyoju No No Wo Kitaeru Otona No Keisan Drill 10/ Kawashima Ryuta / Cho

БбKawashima Ryuta Kyoju No No Wo Kitaeru Otona No Keisan Drill 10
БбKawashima Ryuta / Cho

 Description

[Machine Translation] Solving simple problems smoothly is effective for the brain.

凌 Credits