ジェネリック彼氏じゃダメですか?～元カレの弟と同居はじめました～

Synopsis

"I'm going on an arranged marriage." With these words, Aiyo Fujimiya was suddenly dumped by her boyfriend. When she returns home, she finds her apartment on fire. Aoi is so devastated by the double whammy of heartbreak and fire that she ends up drinking herself to death, but when she wakes up the next morning, she finds not her lover who she thought had broken up with her yesterday, but a man with the same face as him next to her...?