Help me find this bl!!

Help me find this bl manhwa or manhua, it starts with a adult man being transferred or reincarnated (i’m not sure), he becomes a child in a orphanage, the orphanage is quite hidden in the forest, the head of the orphanage uses dark/black magic and has been secretly using it on the kids to experiment on them(they die), the ml and the mc plan out an escape, they succeed but when the orphanage catches on fire they both end up not seeing each other for a few years.

I AM DESPERATE, PLS HELP ME!!