"I must not be late! I made a promise to my childhood friend Simonia, who is a year older than me, that if I was Late, I would be severely punished... For making your beloved wait." However, after some time, our relationship was temporarily interrupted, because we studied at different educational institutions. A year passed and I was looking forward to meeting my beloved... But time inexorably changes people and this girl was no longer my Natsu-Chan...