Before he was a protector, Kenshin was a fearsome assassin known as Battosai. But when he meets the gentle Tomoe Yukishiro, his story begins to change.

Riko is 27, working as a love simulation game designer, and she no longer has big expectations for a man in her life. One day app company TIMEIS, lead by Soichiro, hires her to work on their latest game.

After learning that all her library books were previously borrowed by the same person, schoolgirl Shizuku sets out to meet him and follow her dreams.