Midnight bus

I will go to Tokyo by midnight bus tonight. The bus start Hiroshima at 21:00. And it will reach Tokyo at the next 7:30. I have to stay in bus more than 10 hours. It's a hard job.
I'll return from Tokyo by bus at tomorrow night. I'll reach Hiroshima in morning the day after tomorrow. So, I have to stay in bus 2 continually nights.
The reason why I do such a hard work is for economy.