So, Rockin' Heaven has one more chapter left of the story, which Mayu Sakai is busily writing now. Is it just me, or does everything seem to be ending at the same time?
The hostility between Ran and his father dissipated entirely in the current installment (#31), with recognition due to Sawa. Although her constant butting into other people's business usually grates on my nerves, I think it was actually necessary in this situation.
As the previous chapter concluded we saw Sawa approaching Ran's father, saying that she had to talk to him. This chapter, she confronts him about his estranged relationship with his son, asking him if he knew that all this time Ran had been blaming himself for the death of his mother. The father is shocked by this news - he had never known. Ran bursts into the room to put a hand over Sawa's mouth to shush her, but his father begins to talk things through, saying that it wasn't Ran's fault - that it was his fault. And blah, blah, blah the tears start to flow freely and the two embrace.
The next morning in class, Sugishita approaches Ran to properly thank him for intervening with the school board for his sake, and Ran let's him know that he is planning on taking Sawa back from him. A knock at the classroom door interrupts their conversation: a pair of younger students wanting to ask Sugishita if he was dating anyone. Sugishita denies this rumor, then goes on to point at Sawa and Ran and announce that they were the ones dating. Leaving the classroom to go to work, he commands the pair to 'fall in love' over his shoulder.
It looks like in the final chapter next month we will at long last have a resolution between Sawa and Ran!