Memories Off 3.5 presents two distinct storylines that share some characters. In the first tale, Omoide no Kanata e, Shogo is in a relationship with his current girlfriend, Neo. However, when Kanata, his ex-girlfriend, makes an unexpected reappearance, both Shogo and Neo begin to question their current relationship. The second story, Inori no Todoku Koro, centers on Inori and her boyfriend, Isshu. They had planned to go together to the fireworks festival, a location that holds special meaning as the place where their romance began. But Isshu cannot attend because of work, leaving Inori to go by herself and reflect on the past two years.