Lesbian sharing a room with a sassy junior graduate who misses the last train, Ami Kishiro, natural Mizuki

While Ami, a professional trainer of new employees, is troubled by a cocky new employee, Mizuki, an unexpected turn of events occurs. She runs out of last trains and ends up staying at a hotel with Mizuki, but what happens next...? As the story unfolds, we can feel the characters' conflicts and emotions, and the climax is thrilling and worth reading.