Gray to Blue no Ai made

A high school teacher named Koutarou is known for his unremarkable appearance and demeanor, earning him the label of a "boring man." His father-in-law, Koushi, is unexpectedly charismatic despite being over 50. Koutarou's student, Sayotani, is young and attractive, often involved in fleeting relationships. These three individuals, separated by age, find themselves connected through Koutarou. The story explores their relationships and struggles with love, highlighting their shared awkwardness in navigating romantic feelings.