.hack//Tasogare no Udewa Densetsu episode 6

It aired on Thursday, 13 February 2003.

Trap of The Steaming Hot Water

Shugo, Ouka, Hotaru and Mireille start the search for Rena in "The World". After receiving a mail from an unknown sender they stumble across a hot spring in an unknown area. Upon entering the hot spring they find it is all an illusion and Shugo uses his "Data Drain" to defeat a monster.