Yandere Simulator IS set in an anime eviroment. However, so me concepts may be a little unrealistic. For example, whacking someone with a dumbbell will most likely result in a concussion, unless you have top strength.
YandereDev should add different killing features based on the strength of Yandere-chan. I know Yandere Simulator is not meant to be the most percise game on earth, but that's just my opinion.