Hikaru, who works at a library and has a bright personality, meets Mito and Monaka, a slightly noisy lesbian gal couple, on the train on her way home from work. Mito and Monaka, who fall in love with Hikaru at first sight when they see her reading a book, saying "Oh no! That girl is so cute!" The two come up with a plan to attract Hikaru's attention by rubbing their breasts in front of her and provoking her with intense kisses in order to somehow get Hikaru to become a lesbian. Hikaru, unaware that it's Mito and Monaka's seduction plan, warns them, "You can't do that on the train!" Thanks to the gal-specific good vibes and Hikaru's natural brightness, the three quickly become close like friends. However, while they are enjoying girl talk, Hikaru feels uneasy about Mito and Monaka's actions, where their body touch on Hikaru gradually increases... The two's actions gradually escalate, and they hold Hikaru's thighs with a W crab claw hold from both sides, and then extend their fingertips to her defenseless private parts... Hikaru, who couldn't hide her confusion, is developed into a lesbian with Mito and Monaka's crab claw technique, and she starts to look forward to meeting them on the train on her way home from work...
