Happy

Leorio is Kurapika's serotonin.

ꜱᴇʀᴏᴛᴏɴɪɴ ɪꜱ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ᴍᴇꜱꜱᴇɴɢᴇʀ ᴛʜᴀᴛ'ꜱ ʙᴇʟɪᴇᴠᴇᴅ ᴛᴏ ᴀᴄᴛ ᴀꜱ ᴀ ᴍᴏᴏᴅ ꜱᴛᴀʙɪʟɪᴢᴇʀ. ɪᴛ'ꜱ ꜱᴀɪᴅ ᴛᴏ ʜᴇʟᴘ ᴘʀᴏᴅᴜᴄᴇ ʜᴇᴀʟᴛʜʏ ꜱʟᴇᴇᴘɪɴɢ ᴘᴀᴛᴛᴇʀɴꜱ ᴀꜱ ᴡᴇʟʟ ᴀꜱ ʙᴏᴏꜱᴛ ʏᴏᴜʀ ᴍᴏᴏᴅ. ꜱᴇʀᴏᴛᴏɴɪɴ ʟᴇᴠᴇʟꜱ ᴄᴀɴ ʜᴀᴠᴇ ᴀɴ ᴇꜰꜰᴇᴄᴛ ᴏɴ ᴍᴏᴏᴅ ᴀɴᴅ ʙᴇʜᴀᴠɪᴏʀ. ᴛʜᴇ ᴄʜᴇᴍɪᴄᴀʟ ɪꜱ ʟɪɴᴋᴇᴅ ᴛᴏ ꜰᴇᴇʟɪɴɢ ɢᴏᴏᴅ ᴀɴᴅ ʟɪᴠɪɴɢ ʟᴏɴɢᴇʀ.

Basically the gap between the beginning of the dark continent trip and Leorio + Kurapika joining the Zodiacs.

This story takes place after Gon and Killua separate and it contains spoilers for the manga so read at u ppls discretion 💀