The Mystical Vow And The Mischievous CEO

Sen Fumetsu, The youngest CEO of Special Operation Agency (SOA) as well as the well-known vicious underground former Mafia Boss is well respected and feared around all the places in Tokyo. Rumors has it that this young girl once used to be the part of a well known Mafia organization named “ Yoru no shisha ” as their Executive, she was took in and trained by the Boss of the whole organisation when she was just 13, became the boss's right hand and a official executive right when she was still just 15, it wasn't even long before she took the Boss's place, they say she had committed over 987 crimes by the time she was 17. But one night something terrific happened that turned her world upside down, it all happened in a blink of an eye, nobody knows why is she now working for the sake of the people's safety and maintenance of peace in the city and why she left the crime organization she worked for in the past?. . .what happened on that night? did she decide to become a better person? or is it something else ?. . .