underdog's manga / #cousin x cousin(1)

5.6 High school student Kyuta's second cousin is Etsuro, a calligraphy teacher and womanizer who for some reason sexually harasses him as well. One day though Etsuro gets injured while protecting Kyuta, so Kyuta comes to live with and take care of his cousin until the injury heals. Will a closer relationship develop between Kyuta and that “good-for-nothing” Etsuro?