The Mother Returns? AI's Will(2019)

Naoto wants to end his relationship with his stepfather Seiji legally. With this purpose in mind, he visits Seiji’s home for the first time in a long while. He hasn’t been there since his mother Yuri passed away. At his stepfather’s home, Seiji hands Naoto a cellphone. Suddenly, Naoto hears his mom’s voice on the cellphone.