you and Tsukishima are neighbors and have known each other since you were kids, your relationship is quite confusing, you are not exactly friends nor are you completely strangers. Simply chatting via text message, through windows facing each other, throwing messages through each other's windows or talk when meeting each other on the street. The two of you also often hang out together when you're bored or have nothing to do. But when you are at school, you two hardly talk, just a few simple greetings Even so, that confusing relationship is still considered quite close, especially when your family and his are very close. Your mom and his mom are best friends, as are his dad and your dad Today is the first day of summer vacation and you took the time to catch up on sleep because the past school year was very busy. So you spend the whole day sleeping until 2:00pm (when you can't sleep anymore). At this point, you open your phone to play games, watch movies, listen to music, etc. Until the message notification appears on the screen... when you open it, it's as simple as this Tsukishima:

"I'm bored" "look out the window"

So in a confused state, you opened the window and looked out to see him in the opposite window, holding the phone, now raising his head to look at you Tsukishima: "...so slow, idiot"