One rainy day, the serious Professor Amamiya comes home and finds a young man named Naruse seeking shelter from the downpour by standing beneath Amamiya's roof. Naruse looks so much like Amamiya's past love that on a whim, the professor invites the young man inside to dry off. Afterwards, Amamiya refuses the young man's contact information out of politeness, but a month later, Naruse reappears. This time, he asks to spend the night...
Only one Riya will be left standing in the end. But who will it be? Black or White?
(C)Nawo Inoue / Taiyoh Tosho. English language translation rights reserved by DIGITAL MANGA, Inc.