There’s something so appealing about the roles being reversed here, usually it would be atsushi, the one whose senses are hypersensitive that would find himself obsessed with his lover. But I know that Chuuya nags and tries to get Atsushi into self-care (retail therapy) and he probably has picked out perfume oils and sprays that suit the reaper while also not overwhelming his delicate senses. I personally think beast atsushi would smell so good with Egyptian amber oil. A little bit more intense than he would like it but he can’t hate it when Akutagawa is absolutely obsessed with it—standing in closer, leaning in to breathe in his scent,,,the longer they’re together the more Akutagawa ends up sprawled out on his lap/above him, nose pressed against Atsushi’s nape and just not letting Atsushi escape his affections. It’s one of the few times Atsushi is absolutely flustered (byakko loves the attention, she’s preening)