It has just been released through onehallyu that Taeyang, a member f Big Bang, and actress Hyorin have recently shopped together in ToKyo.
According to that news, Hyorin was on a holiday in Japan and Taeyang was also in Japan. So they spent a bit of time together.
The two confirmed their relationship in June 2015, and have since been maintaining their romance with support from the fans.
Source: Onehallyu