Read manga: Les Sciences Et Les Fantaisie

manga
Summary:

From AarinfantasyA really cute oneshot about relativity and time travelWhen salesman Yoroizuka runs into his ex-boyfriend Tatemichi Koreeda, he's uncomfortable. But Koreeda gets Yoroizuka assigned to help him in the lab, and Yoroizuka starts to remember all the good times he had with the unromantic mad scientist. If only he could remember why they broke up...