Akira Sadaki, 16 years old.

Just as he was about to be transported to another world, he heard a voice offering a random cheat. The one he chose was the "Efficiency Cheat." Akira acquired this cheat "because there were no other options!", but the next moment, for some reason, he found himself in an unknown grassland. An isekai transfer tale that begins with "Where am I?" An isekai comedy fantasy, with the protagonist destined to become the strongest.

Also serialized on Kakuyomu.

2018/5/21 I posted my original illustration to Mitemin. (https://7484.mitemin.net/i307940/)

2020/1/25 Oh, by the way, when I submitted this to the Kakuyomu Contest previously, I was selected for an event where I could receive feedback. I'll post the details from that time. (https://kakuyomu.jp/info/entry/wc4_rev_vol4)