Oh! My Emperor

Episode 8 (1x8)

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The anal cloth explains the powers of the butterfly, and the butterfly tests her healing abilities. King Shin confesses his feelings to Nak Bi-bi, and Sa Eon-yeon is shocked and runs away. When Sa Eon-yeon disappears, Nak Bi-bi panics and all 12 Seong-joo sets out to find Sa Eon-yeon.