After Destroying the World, I Was Saved by Another Tsunayoshi

Sawada Tsunayoshi, or Sawada Tsunayoshi in the parallel world, accidentally came to the original world after destroying the world. Here he met the man who redeemed him - Sawada Tsunayoshi. A gentle child; a tolerant sky... In this parallel world, Tsunayoshi assumes the pseudonym Xia Yuyu as a mathematics teacher... What kind of sparks will the two collide with? Warning: Sawada Tsunayoshi Motto: Gentle people always bring warmth to those around them