HTC's Valentine's Day isn't going very sweetly, as the company has announced that one of its top executives is resigning.

Chialin Chang, HTC's President of Smartphone and Connected Devices, has resigned effective immediately. The reason for Chang's departure is simply listed as "personal career plan."

There's no replacement for Chang right now, so it looks like HTC CEO and President Cher Wang may have some more work to do in the near future.

The smartphone market hasn't really been going HTC's way in recent years. While the company has released some solid smartphones, it hasn't been able to regain its former glory. HTC did recently sell some of its top smartphone talent to Google for $1.1 billion, giving HTC a nice infusion of cash, but it'll be interesting to see what the remainder of 2018 holds for HTC.