The human race extended its life field and greed to the vast reaches of space… In Space Era 0156, a war breaks out amidst all of the colonies in space. Earth begins to construct a new space battleship called Tiramisu in secret. Just as the war begins, one genius pilot steers the Tiramisu as a beacon of hope for humanity.
一之瀨昴雖然是宇宙戰艦提拉米斯的王牌駕駛員，但是在這裡生活的全是年長的人。昴無法適應集團生活，一直窩在自己的專用機「杜蘭德爾」裡面。而處於青春期的昴也是一個逗逼，總是進行一些搞笑的作死，他這樣的駕駛艙里蹲能否順利畢業，成為大人呢？