The Anime Lad
Yuuto tests a shrine legend and lands in a world steeped in Norse lore. His solar-powered smartphone comes with him, while knowledge from school gives him ideas the Wolf Clan can use. The battery arrangement is practical. The surrounding situation is less so.
Super Eyepatch Fox
Test the shrine legend. Land among Norse-shaped clans. Yuuto has a solar-powered smartphone and the school knowledge he remembers from home. He applies both to the Wolf Clan’s problems. No effortless strength appears, only ideas carefully placed in unfamiliar conditions.
Gigguku
Yuuto brings school knowledge into a clan society shaped by Norse myth, and suddenly ordinary lessons have enormous leverage. His solar-powered phone keeps the modern connection tangible. The fun comes from seeing familiar information matter because nobody around him shares the same background!
Father's Basement
The fantasy society and admiring warrior women come from a familiar isekai package. The specific advantage is better than that packaging. Yuuto relies on school knowledge and a solar-powered smartphone, giving his contribution a practical source instead of handing him unexplained strength.