Half a year ago, Yanai Makoto, a normal office employee, became his friend’s guarantor for a large loan, but in the end the friend fled and left him with enormous debt of 30 million yen. Yanai became a cal...

1-4. Himitsu no Okusuri Taku and Mutsuki are childhood friends who no longer talk as much as they used to because Mutsuki gave Taku a brush-off. A year later when their parents go on vacation and Mutsuki is ...