5Nagi Yoroizuka, a twenty-seven-year old systems engineer at a software development company, is facing down her thirties with no sign of romance. She works hard at her job, but things never seem to go right. Then, when a series of mishaps leaves her at her lowest point yet, a childhood friend reappears to offer her a hand. Not only is this genius engineer warm hearted and good looking, but he also gets along great with her! There's just one problem: She's only ever seen him as a friend, while he's been hiding his feelings for her their whole lives. But even if she's willing to give him a chance, will trauma from her past prove too much to overcome?