It got tagged as shounen ai in bato.to? So ? This is shounen ai or not? I hope it is tho

No, it didn't..at least when I checked. Plus the tags on MU are far more accurate than those on batoto.
But I really hope it turns out shounen-ai *fingers crossed*

It's not shounen-ai BUT there is a Boys love undertone. Which means that there won't be any guy on guy exploration, but Touma does have a crush on Taichi. Mangaupdates shows the best tags. In Mangaupdates it says there is a boys love undertone.