Mark me, I'm yours!
*KNOCK*KNOCK*KNOCK*
"Coming!" shouted the person inside the room. "Finally you've decided to show up! I've been waiting for you Ei-tan!" Yuuta calls Eiji, Ei-tan ever since they were young, he was a few months younger than the other which is why he had decided to call him that.
"Yuu! sorry I'm late, How have you been?" Eiji on the other hand calls Yuuta, Yuu for short, most of the family members of the Ikeda family call Yuuta like that too.