Saving 80,000 Gold in Another World for My Retirement
One day, Mitsuha falls off a cliff and is transported to a medieval Europe–type world! After a near-death encounter with a pack of wolves, she then realizes that she's able to transport between two worlds—this one and her own. Taking advantage of this ability, Mitsuha decides to live in both worlds and calculates that she'll need 80,000 gold coins to be able to retire! Mitsuha now has to come up with different ways to collect her gold coins!
Rougo ni Sonaete Isekai de 8-manmai no Kinka wo Tamemasu, 老後に備えて異世界で８万枚の金貨を貯めます, Roukin