I just remembered Sora's existence and I was curious to know what actually happened to her.
On their last post they said that they were going indefinite hiatus because of her health.
The way she wrote this makes me believe that Sora had Cancer or any type of terminal illness.
One time i read a ntr manga called I Just Snooped Through Her Smartphone and let me tell you it really pissed me off, So the boyfriend was looking through her phone while she was sleeping and since this an ntr he found out that she was cheating with her barber, what really pissed me off was that he decides to not do anything because he thinks that the betrayal of him looking through her phone is just as a bad as her cheating.
As someone who experienced being cheated on it absolutely is not the same, she already broke that trust between in the relationship so it wouldn't matter at this point, I would have broken up with her the moment I found out about it.