One popular wgm oc fanfiction could be those that focus on creating unique love stories between the original characters and the inserted 'oc' (original character). For example, a story where the oc has a very different background from the regular wgm cast and how they navigate the pretend - marriage scenario.
First, you need to have a clear idea of your original character (oc). Decide on their personality, background, and what makes them unique. For example, if your oc is a shy artist, think about how that will play out in the wgm setting. Then, familiarize yourself with the wgm concept and the usual scenarios that happen in the show.
Romance is a very common theme. Fans love to write about the OC falling in love with Lee Min Ho, with all the sweet moments like first dates, confessions, and kisses.
There's also a fanfiction titled 'Love Beyond the Screen'. In this, the OC is a normal girl who accidentally gets involved with Lee Min Ho in a series of events that are both humorous and romantic. The writer does a great job of building their relationship gradually, making it very engaging to read.
There are some great Taecyeon on 'We Got Married' fanfics out there. One popular one focuses on his sweet interactions with his virtual partner. It really captures his charm and the fun concept of the show.
You can try fanfiction websites like AFF (AsianFanFics). There are often many APINK WGM fanfics there. Just search for 'APINK WGM' in the search bar and you'll get a list of relevant fanfics.
One great APINK WGM fanfic is 'APINK's Virtual WGM Adventure'. It has an interesting plot where the members of APINK engage in various fun and romantic scenarios in the WGM setting. The interactions are really cute and it stays true to the personalities of the members.
His charm. Taecyeon has a very appealing personality, and in fanfics set in the 'WGM' world, that charm is magnified. Fans love to read about his romantic side.