The Oblivion Gene

Yeon-woo asks So-jin to break up with him, saying Kang-hoon is meant for her. Upon hearing So-jin's breakup with Yeon-woo, Yeon-woo tries his best to console her. Kang-hoon asks So-jin out for a date, but So-jin keeps getting reminded of the days she spent with Yeon-woo. Meanwhile, Kan-hoon falls into a critical state after a fire breaks out in an empty house.