[Crossover] A Corpse Lies Beneath Miss Sakamoto's Feet

[An idea I've saved. Not sure if I'll write it] Sakamoto Rieko was once a lucky SSR, with top-tier reincarnation skills and top-tier genetic-recombination skills (which is just a fancy way of saying she was rich and gorgeous). Then one day, she began turning into a death-god middle schooler who made Inspector Megure weep and Kudo Washing Machine fall silent... Circumstances forced her to study detective skills, and she soon fell for Kudo Washing Machine. But just as she was getting ready to make a passionate confession, she ran into his childhood friend at his house. And that wasn't even the main problem. The childhood friend gave her a strange look and told her that the washing machine had been overseas solving cases all along and had never come back! All right, then. Here's the question: Who exactly is this person who's been teaching her detective skills, watching movies with her, and doing all sorts of unspeakable things with her?! Sakamoto Rieko swore she'd blast this impostor with an Italian cannon. A few days later, she posted a tweet: So good! [Picture: spaghetti] A sweet romance, mostly everyday life with cases woven in; One-on-one pairing, male lead decided. A crossover with lots of slice-of-life and sports anime~