* What you need
Doll body, 1 Big S-hook(for neck), 4 long S-hooks
1ea 40cm elastic string, 2ea 60cm elastic string, puller,
(make a knot for the strings)

* Arranging body
Arrange the body parts in the right place.
Put the parts from R(Right) to L(Left) in Chest-Waist-Thigh-Calf-Foot-Upper arm-Elbow joint-Lower arm-Wrist parts-Hand order.

Pass 40cm elastic string through the chest part coming out from both arm joint parts. Place the knot at the center inside of chest part.
Hang the string, which is not for assembling now, on the neck to prevent to be tugged to the other side. 

Pass the elastic string for assembling now through upper arm-elbow joint-lower arm parts-wrist parts and hang an S-hook of wrist joint

on the string to hold it.
Make sure the line-shape hole directing upward.
Use the other part of string held on the neck and pass it through upper arm, elbow joint, lower arm and wrist parts.
Then, hang an S-hook of wrist joint on the string to hold it.

Pull the both arms to adjust tension. Make sure that the knot is in the middle of inside of chest part. 

Pass 2ea 60cm elastic string through neck and neck parts, hold it with big S-hook through neck parts.
Pull the elastic string out from leg connecting place for the same length.

Hold one side of elastic string and pass the other side through thigh-calf parts, and hang the S-hook of foot parts to hold it.
Do the same process to the other side of elastic string, pass through thigh-calf parts, and hang the S-hook of foot parts to hold it.

Pull the both legs to adjust tension.

Place the neck parts on the neck and pass the big S-hook through the neck parts.
Then turn the S-hook 90°and fix it in the groove.

Put the head on.

Completed!! 

* How to change DL Boy's foot parts.

* How to change DL Boy's hand parts.