I want that maruchan kind of relationship
When you want a person to be with you just long enough to make you happy, then leave you with no warning
My crush said he'd be my boyfriend. Then he left me alone. That was maruchan.
My friend said he'd hang out with me. Then he never showed up. Classic maruchan.
My teacher said she'd help me with my test. Then she vanished. That was maruchan.