炭酸恋愛水

Eru Jinnai is in love with Seiya Mitsutani, but Mitsutani is her teacher. Luckily for her, she has no competition for Mitsutani's affections because he's a hated teacher at school. But, Mitsutani treats Eru only as one of his many students. What shall she do to change his mind? (Source: MU)