From Chibi Manga:
What happens when a golden-hair Yankee ♂ and a plain-Jane bespectacled girl ♀ switch places?!! Will this be the start of an impossible start love story—!!!

Ryuuko returns to Onomichi where she had lived until she was primary 5. She had enrolled back in senior high and she only had 1 purpose to confess to her childhood crush Sakurai Mei!

However when she meets Mei for the first time in a long time, he doesn’t seem to remember her. Because she had transformed into this the dull plain bespectacled girl.

Despite that, he doesn’t know how to reject Ryuuko when she confessed her feelings to him. While he was filled with “??” in his head, the two accidentally fell together down the stairs and had their bodies switched—??