  Given any smooth cubic curve $E\subseteq \mathbb{P}^2$, we show that the
complex affine structure of the special Lagrangian fibration of
$\mathbb{P}^2\setminus E$ constructed by Collins--Jacob--Lin arXiv:1904.08363
coincides with the affine structure used in Carl--Pomperla--Siebert for
constructing mirror. Moreover, we use the Floer-theoretical gluing method to
construct a mirror using immersed Lagrangians, which is shown to agree with the
mirror constructed by Carl--Pomperla--Siebert.
