This series looks fun, right up my alley. BRB, binge reading all 31 chapters.
EDIT - on the series:
It reminds me "My Death Flags Show No Sign of Ending": boy reincarnates as a game villain but avoids being one. However unlike Harold, Len isn't forced into a certain path.
I don't like the whole maken ex machina thing - he seems to develop a new demon sword skill "conveniently" when he needs it the most. The author could've handled this better, I think. Still, better than having him start even more powerful right off the bat.
On the other hand, I love how the romance with Lydia is developing; sure, it's slow, but it's innocent and heartwarming. The two senpai adventurers are also bro tier, it's refreshing to see them watching out for newbies instead of picking on them.
I'm not sure on the way they handled Chronoa? Okay, having him protect someone who's extremely powerful is cute, but we (readers) already knew she was a big shot right off the bat.
HE STOLE YERKQU'S HORSE!
On ch31: oh boy, Fiona is a rival for Lycia, isn't she? Including mutual acknowledgement of each other's strengths. ... ...I'm still on Team Lycia though.
The monsters being of different species hints a stampede. But I don't know if this story will handle it this way.