6 : Illusionary Avenger Today

Kirito discovers that the "murders" were actually staged using teleport crystals and clever equipment manipulation.

The location of the initial investigation and the faked murder of Kains. 6 : Illusionary Avenger

It introduces the concept of the Relationship System in SAO, where players can marry and share inventory space. Where to Watch Kirito discovers that the "murders" were actually staged