The remaster also includes new side stories and music.
If ʏᴏᴜ ʜᴀᴠᴇn't pʟᴀʏed Doki Doki Lɪᴛerᴀᴛure Club ᴀᴛ tʜɪs poɪɴt, tʜᴇre's ɴᴏ avoidɪɴg tʜᴇ truth ᴀʙᴏᴜᴛ ɪᴛ: It ɪs ɴᴏt tʜᴇ ᴄᴜᴛe vɪsual ɴᴏvel ᴀʙᴏᴜᴛ dᴀᴛɪɴg thᴀᴛ ɪᴛ ᴀᴘᴘᴇᴀʀs ᴛᴏ ʙᴇ ᴏɴ tʜᴇ surꜰᴀᴄᴇ. It's a gruesᴏᴍᴇ hᴏʀrᴏʀ ɢᴀᴍᴇ.
Announced at IGN's pre-E3 showcase, Doki Doki Literature Club Plus is a rerelease of the game with new side stories, HD art, more than 12 new music tracks, and over 100 unlockable images. That's according to the trailer that appeared at IGN's show, which plays up the contrast between the game's sweet exterior and horrifying true nature.
Doki Doki Literature Club Plus releases June 30 on Steam and the Epic Games Store (and consoles). There's also a boxed edition releasing sometime this summer. The trailer's embedded above, and there's more info at ddlc.plus.