It is a pen with a brush-like writing taste. 筆のような書き味のペンです
It is a pen that uses a heart as a brush tip material, like a bakemon (which is too uncomfortable to use). It can be used to create line drawings and textures.
ハートを筆先の素材にした、(使い心地が悪すぎる)バケモンみたいなペンです。線画や質感を出す時に使えます。