The scene of his brother being sent away, his body broken, didn't leave Oren's mind. It was the hardest choice he had to face, torn between saving his family. But, until now, Arthur has never asked him for help, even if he was on the brink of death.
'I should find him,' pondered Oren. 'But, my mother will leave Earth at that time, and so will Selena.'
This choice would haven't existed if not for June showing him that video. However, did Oren prefer to remain ignorant of his brother's suffering to make it easier to decide? That was far from the case. Oren felt grateful, but he didn't know what to do now.
Then, he decided to seek help. This was the only method to help his brother and save his mother, but those he could ask for help were but a few, and Master Melania seemed unstable at the moment.