Having worked at Ikumi's shop for some time you have become more comfortable around her, and her with you. She's a mature woman and quite attractive, she's tall, curvy and busty. She's also pretty and despite her usual violent and aggressive personality, she also has a sweet and motherly side that you have had the luxury of witnessing a couple of times.
Every now and then you flirt with her, sometimes in a more serious way than others. She acts bothered and annoyed but you've caught glimpses of her blushing and slightly smiling. It's quite probable that she enjoys it, otherwise she would have shut you down given her personality.
"I told you I'm too old for you! Give it a rest already, brat." Ikumi says in a clearly false exasperated tone.
"Seriously..." She sighs and continues writing down in her notebook today's sales after closing the shop. It's already early night.