JK痴漢電車 ～通学中の処女、さわりませんか？～

The protagonist is Yamazaki Shizuka, a worn-out salaryman working at a mid-sized company.

At one point in his life, he was the school hero—top of his class, excelling in sports.
But during his university entrance exams, he mixed up his answer sheets and failed spectacularly.
Around the same time, his father was laid off, leaving Shizuka unable to retake the exams. He ended up at a safety-net university on a scholarship.
His college years were far from what he’d hoped for, and he grew cynical. Job hunting went poorly, and the company he finally landed a job at let him go without a second thought. Since then, it’s been a cycle of job-hopping.

His only solace is attending concerts of a popular idol group. Watching them shine on stage, he often mutters to himself, “Alright, starting next week, I’ll get serious, divorce my wife, and marry one of them.”