Help getting CG, Cause I have no clue what to do... Options

[Rune_Ocarina]

I've been trying to unlock CG 21, where Lina seems to be yelling at Serene about something. I'm guessing you get it when you enter the ruins before Cierra joins your party. I've tried several options in the root rooms while passing the sleeping demon and the room with the magic locked treasure chest. Does anyone know what to do?

[drag10]

hi all, just passed by and wanted to comment on obtaining the serene and lina cg. from my experience, i think you have to cut the big mushroom and fight the mantraps in the forest first. later, at the start of area 3-3, lina will comment on how the ruins are crappy because it's the passage of time and serene will tease her about it, which will net you the cg.

i concluded that this is probably the way to obtain the cg since i reached area 3-3 once without cutting the mushroom and i didnt get the cg that time. hope this helps.