Pensiero Sereno 2-color ballpoint pen + mechanical pencil

[Sereno]
Italian word meaning "sunny" or "calm"

The "Pensiero" writing instrument series is perfect as a gift.
"Pensiero" is an Italian word that conveys a sense of compassion and a small gift.
The words have a Japanese-like sense of refinement and are imbued with the hope that the writing instrument will inspire both the giver and the recipient with warm feelings.

How to replace and refill the lead (rotary type (2))