Unspoiled is amazing, but it is more exactly he
is indeed a child at that period of time. I love re-reading that story over and over again because it is so adorable. Forthright made the cutest Sesshoumaru without leaving his lordly attitude.
I'm gonna recommend:
Curse by Kessa
Summary: It started out with a curse. It would lead to an alliance. Instincts will rise, and the end would be something neither would have ever thought possible. Story told in 300 word chapters.
Rating: M
Universe: Canon
I think there are several more, but I can't recall a thing. If you want to read the chibi Sesshoumaru and Inuyasha, I'll recommend (of course, I recommend Unspoiled):
Boy From Down the Street by The Norrington
Summary: When Kagome returns from University, she is surprised to learn her family has become accustomed to having a yokai around. When Kagome becomes interesting to this yokai, she doesn't know if she's amused, or concerned. A long winded romance told in bits and pieces. Rated for Gore. -3rd Place Winner for Best Alternate Universe/Reality 2012 Semi-Annual Awards-
Rating: MA
Universe: Alternate
The Adventures of Chibimaru and Gang by MissTeak
Summary:The title says it all! A collection of MissTeak's attempts at cute, funny stories revolving around a six year-old Chibimaru and Gang in their daily lives. If you've enjoyed 'I knew you'd marry me', this is the one for you!
Rating: K
Universe: Alternate
Fluffy Puppies by CatGirlKitsune
Summary: AU. A 'What If' Drabble fic. Where was she and who was that cute little boy with the puppy ears? And what was up with his rude older brother? Eventual Sess/Kag
Rating: T
Universe: Alternate
That's My Boy! by Kanna37
Summary: A seven year old Sesshoumaru meets a seven year old Kagome, and decides its time to learn the Inuyoukai courting rites - to his father's rather strained pride.
That's My Girl! by Kanna37
Summary: Continuation of That's My Boy! for those who asked. Little Sesshoumaru and Little Kagome have a tiny adventure on the playground... now a collection of chibi one-shots. Newest: Little Sesshoumaru Gets a Little Sister. 2nd Best Humor Fiction Dokuga 4th Quarter 2011 for Little Sesshoumaru's First Kiss.
Welcomed Interference by Kanna37
Summary: Sometimes what seems like nothing but trouble can end in quite a satisfying manner. An almost eleven year old Sesshoumaru finds that out - the easy way.