(Just to clarify his grandfather died a little over a year before.)

Yoongi got out of his car and headed straight to the class not even stopping by his locker. First he need to know about the project that they were supposed to do as a group. They were informed about it yesterday only and yoongi was absent on that day. He had some work at his office. As being the only remaing successor of the company, he had to manage both his office work and university work.

Time skip
During lunch
Jimin sat on the lunch table annoyed. He was just so annoyed with this school and everything that was happening today was just more annoying.
"I don't wanna do it.." he whined with irritation in his voice. Others were confused at what he was talking about. They looked at him with raised eyebrow.
"I don't wanna do that project " he further added.
"Why?" Asked namjoon with confusion. Jimin, with a sigh, replied" it's not the project but the partners i am doing it with.."
At this statement taehyung, who was about to eat, raised his eyebrow in questioning manner with his chopstick hanging in air.
"You know i am not talking about you but about him." Jimin said.
Others still looked at him with confusion. "Me, tae and that min yoongi are in same group.." he sighed again "...and you know how much i hate him."
Now, others knew why he was so annoyed. Everyone of them knew how much he hate yoongi. He even despire being in same room as him.
But why? They didn't know that. But if we ask the same question to jimin he may also not be easy to answer the same question.
Actually he also doesn't know why he hate him so much. Maybe because of him showing off his money to buy anythimg he want. Everyone knew he was very rich. Just this much nothing more. It was obvious for them to know that by the car he daily comes to college and seeing his clothes and all. As per jimin, yoongi tries to buy others and their friendship by his money.
He had this mindset about yoongi because of a particular incident that doesn't directly involved him but somehow did.

Time skip
After lunch break
Yoongi just entered the class and took his seat in middle row. There were still student coming from the break but the classroom was pretty much empty. There after some time entered taehyung and jimin who,as decided earlier, went to yoongi to discuss about the project. While taehyung introduced himself and jimin to yoongi, jimin sat two rows ahead of where yoongi was sitting with an annoyed expression on his face.
Yoongi offered them the time of evening at his place for the project. Taehyung agreed for it but jimin didn't. He, firstly, didn't want to go to his house and ,second, he had plans for evening.
So, instead he agreed to do it in afternoon at taehyung's place. But when discussed about the address, it was totally opposite for jimin and yoongi to go there. Therefore, it was at the end decided to go at yoongi's place only.

___________________________________