Kenja wa Nemuru

Miharu hasn’t been having a good year. Her mother died, leaving her only a single ring to remember her by, and her father went bankrupt – leaving her with all his debts! Though she intended to sell the ring to pay off her debts, a run-in with a hot boy and a brush with alchemy leave her unable to part with it… literally!
*Series doesn’t have solid ending as far as it is known.