He graduated from my university this year ,and works at IT company. Because his salary doesn't change however long he works, he doesn't have to go to work at earlier time. So, according to him, some senior employees appear at the firm at noon.
After visiting my labratory, he left for another labratory he belonged to. The notable point is that he came to my labratory at first. It means his most intimate friends are in or around my labratory.