Masakana Koi ni Narimashita.

When Mizuki Date (27) moves in next door to Shiori Iwai (35), a woman past her prime, her daily life undergoes an upheaval!! The reason for the upheaval is he appears to have a fish for a face!? However, since spending the night with him, he sometimes looks like an extremely handsome man...!? Shiori's love quickly begins to stir...!! An intense nonstop heart-pounding love comedy!! (Source: Shogakukan, translated)