I don’t understand the “Sebastian” reference here, but Dara uses that word when she’s eating crabs.. XD So unless they’re going or have gone to eat a bunch of hapless crabs, or doing like crab symbols, then IDK.. Kekeke! XD Cute WBU cast! I still wish Seungyoon could’ve joined them.. ^^
Sebastian~ Mabuhay♡
Credits:
Source: ebeomkyu
Re-uploaded by: OhDara
oh-dara.com 
Comments on: "Instagram: Lee Beom Kyu Shares Another Cute, Warm Photo of WBU Cast During their “Dara Tour” ~ “Sebastian!”" (1)
Sebastian is the hermit crab in The Little Mermaid