One of the prestigious university existed called AIOSU aka All in One Serendipity University. Jihoon admired Yoon Jeonghan but as he was having a crush on him, he knew that his Hyung Lee Jisoo was more compatible to Jeonghan. Jisoo was the university Student Council President which has a complicated relationship with Sports Club Committee President Choi Seungcheol. Choi Seungcheol percieves that they were dating yet Jihoon thought that Seungcheol was only having a one sided love for his hyung nd he dislikes Seungcheol a lot causing him giving a name Who Must Not Be Named among them brothers. Seungkwan and Seokmin are Jeonghan's bestfriend and the two are shipper of JiHan and will make a move no matter what because they agreed that the two should meet cause they are ment to be.