Wanko Soba ni Iru

The single, 28-year-old office lady Sakiyama is crazy about the "dog" she took in recently. His name is Shiro. Living with the cute and playful Shiro offers solace for Sakiyama, who was getting tired of her life. But there is one secret that they must hide from everyone. Shiro’s true identity is actually Sumita-kun, a college boy! (Source: Comic Days, translated)