At the end of May 2011, Mari-san, 【Ren】's girlfriend, had died in an accident. Eight days after the accident, he wrote on his Nico Nico Douga Community about her death and the torments she had endured because of some of his shameless fans. But even though she was harassed, it didn't shake their relationship and Mari-san continued to support and encourage 【Ren】 to keep on singing. “No matter what happens, please don’t give up singing.”
In honor of Mari-san, 【Ren】 sang "Namae no Nai Uta"Nv, which can only be viewed in his community.