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.
So, of course, he's going to tell me
that what I'm doing is wrong.
Wird er sich dagegen stellen,
Imagino que se opondrá a lo que quiero
hacer y dirá que no es correcto.
Il va forcément s’opposer à mon idée
et me dire que ce n’est pas bien.
Quindi mi dirà che 
quello che sto facendo è sbagliato.
Então, claro que ele dirá
que o que estou fazendo é errado.
Наверняка он решит,
что я поступаю плохо.