A kawaii cute highlighter pen. The greeting card version of this design, available from my UK stores, has the pun 'you are the highlight of my life' written on it.
Where to buy online
Direct from us here - see products featuring this design.
You can find the design on t-shirts in most stores, but also on other products depending on the store (e.g. hoodies, mugs, stickers, notebooks, phone cases, greeting cards, cushions, socks etc).