Now that the story has many times shown how much Yoru loves Asa, Asa is definitely safe in Yoru's hands. Just one smal inconvenience though, Yoru is a Yandere, she will definitely be very jealous with anyone approaching Asa. So, how's Yoshida supposed to get close to Asa for the next month now? I think there are 2 ways he can do it,
1. Capture Death, have a contract with her and order her to take Yoru away as she did in Aquarium.
3. Make a contract with War devil AsaRu by offering to help them to deal with Death, in return Yoru is not allowed to weaponize Yoshida.
...Any other ideas?