Does anyone know this one manga that was adapted from a video game? To be specific, the ga...

Does anyone know this one manga that was adapted from a video game? To be specific, the game it was based on was very similar to games like mad father, ib, and the witches house. It was a pixel-horror game set in a cursed forest. It’s not the angel of death. There were two main playable characters, a girl wearing a yellow shirt and a boy in a black Japanese school uniform. If i recall correctly, the forest was cursed with the souls of children and there were these blue stones that could ward the evil spirits in the forest off? The main guy also had a katana that was made out of those blue stones. I think the main girl had memory loss or she was forced to lose some part of her memories by someone in order to protect her and dissuade her from ever going back into the cursed forest? The true ending in the game was actually very wholesome and a nice change of pace compared to games that were similar to it like mad father and such so it always had a special place in my heart for that. I remember the story but i cant remember the title at all and its driving me crazy.