Darkness OVA ep1
Darkness ep1-10
Darkness OVA ep2-3
Darkness ep11-12
Darkness OVA ep4-6
Momo no Rakuen (recap)
Darkness 2nd ep1-10
Darkness 2nd OVA ep1
Darkness 2nd ep11-12
Darkness 2nd Specials
Darkness 2nd OVA ep2-3
Multiplication
This order makes the most sense story-wise and has the least leaps between episodes.
Below are some explanations for every episode that should be watched out of order.
stack
Anilist Sync