Unnecessary

Wow, that Yeong guy is really being unnecessary about all this. Dobin's just an stranger(as well as a third wheel (〜￣△￣)〜) and could easily be sent away with a random reason for the 'bed incident' yet Yeong just had to drag a bright light bulb into the slowly but surely budding relationship of our two mains Σ( ￣□￣||)
And is it just me or is Dobin having some drastic personality change towards the end panel (⊙…⊙ )