Tomo-chan is a Girl!

Tomo is in love with her childhood friend Junichiro, but he can't seem to see past her tomboyish nature, so Tomo tries changing the way she speaks and behaves to seem more girly.

After Tomo is groped by an old man on the bus, Junichiro suggests that she stop wearing skirts. Then Tomo meets Carol, an English girl that all the boys in school admire.

Tomo is shocked to learn that Junichiro and Misuzu briefly dated in middle school. Tomo then decides to invite Junichiro out on a date herself, with help from Misuzu and Carol.

Tomo wants to experience some girly interaction, like hugging and hand-holding, so she tries it with all of her girl friends.

Tomo visits each of her best friends' houses. She meets Carol's mom, gets some help studying for midterms at Misuzu's, and... stays overnight at Junichiro's house?!

Misuzu and Carol give Tomo an extra-girly makeover and send her to the convenience store, where she unexpectedly runs into Junichiro. Later, Tomo gets fired up for the school's ball sports tournament.

Junichiro recalls how he and Tomo first met, and the four friends spend a day at the beach.

Misuzu sees that Misaki and Carol need help expressing their feelings for each other, so she comes up with a plan to get them together... but the results are far beyond what she expected.

Junichiro finally confronts his own feelings for Tomo, and Tomo questions whether she really wants the friendship they have to turn into something else.