Regret Message portrays Riliane and details her standing by the sea and throwing a bottle containing her wish into the water, as a local legend says the wish will come true if she does so. This sight brings back a past memory of her brother Alexiel and regretting the actions she did that led to his demise. The wish she made is "If we could be reborn, I want us to be twins again". This song was featured on Akuno-P's Evils Theater, Prelude to forest and Evils Kingdom as well as EXIT TUNES's Vocalogenesis and STARDOM 3. This song has entered Hall of Legend.