The Assassin found His Family in The Fantasy World

Alijah Lopez was the only heir of the most prestigious and ancient assassin family of England. But, when he just turned ten, their family faced a unpredictable disaster in the hands of their rival family. To keep him safe, his parents sent him to an orphanage in the guise of an orphan. Then, along with his sister they went into hiding.
But, their rival family quickly catch onto them and his parents were brutally murdered.
To give his little sister a carefree life, Alijah soullessly worked under the muderer of his own parents and suffered humiliation years after years. But he still didn't managed to protect his last family member.
Eventually he was broken mentally and physically and lost the will to live. He destroyed the enemy fully and finally attempted suicide.
'I wish I could have my own family if reincarnation is possible.' That was the last thought of Alijah Lopez.
Well, he didn't reincarnate but was transported to a fantasy world instead. His looks remained the same but his body had undergone a earth shaking change.
Will Alijah manage to achieve his wish in this strange world where he was completely alone?