While running to his work Ren noticed a soft 'buzz' in his bag. He digged through his stuff looking for his cellphone. By the time he found it the buzzing had just stopped. 1 missed call from: Ryuu.
"Damn.... He's not gonna let this slide... Better call back."
He dialed Ryuu's number, which he knows by heart and resumed his way to work.
He hopes Ryuu wouldn't be too pissed, but giving his personality... He'd better prepare for a verbal ass-kicking.