Vow 1: Attempt

Sawada Tsunayoshi lives by himself and enjoys it to the fullest yet fate seems loved to torture him so much when seven (eight) demons wanted to make a contract with him. Creator & Demon AU! Strong!Tsuna, Smart!Tsuna, Partial!Dark!Tsuna Arco27, R27! Loosely and barely inspired and based by the song 'Alluring Secret Black Vow' sung by 96neko.