A class observation day was scheduled to be held in Gaku's class. However, Gaku was worried that if Hayato took a day off to attend, it would cause inconvenience at his workplace and increase his workload.
Both of you are very important friends of mine.
You're my pillars of support!
Вы оба мои лучшие друзья 
и оба меня поддерживаете!